Frequency detection device, frequency detection method, circuit control device, circuit control method, delay circuit control method, and delay circuit system

ABSTRACT

Disclosed are a device and a method for comparing a detected frequency signal (first frequency signal) and a second frequency signal which is obtained by delaying the detected frequency, to determine whether the frequency transitioned to a predetermined area on high frequency side or reached a predetermined value on the upward direction side. The frequency detection device ( 1 ) comprises: a delayed signal output circuit ( 11 ) that outputs a second frequency signal (F 2 ) obtained by delaying the first frequency signal (F 1 ), which has a frequency that changes over time, by a set period (Δi); and a determination circuit ( 12 ), which inputs the first frequency signal (F 1 ) and the second frequency signal (F 2 ), determines whether or not the cycle of the first frequency signal (F 1 ) is included in the cycle of the second frequency signal (F 2 ) and/or whether or not the cycle of the second frequency signal (F 2 ) is included in the cycle of the first frequency signal (F 1 ), and outputs a determination signal.

(Invention A): The present invention relates to technique to compare second frequency signal (in this first frequency signal predetermined time delayed signal) with first frequency signal (detecting signal), specifically, relates to the frequency detection apparatus (and frequency detection methods) which can judge that frequency of first frequency signal reached predetermined value.

(Invention B): For example, the present invention relates to technique to detect, (a) input current (input current of the electric circuit such as power inverter circuits), (b) the input voltage, (c) output current, (d) output voltage, (e) reactor voltage, (f) reactor current, (g) voltage between terminals of the electric switch, (h) switch current, (i) diode (commutation diode, rectifier diode) voltage , and (k) diode current, specifically, the present invention relates to a good controlled electric circuit controller (and an electric circuit control method). Even more particularly, the present invention relates to an electric circuit comprising the frequency detecting circuit which converts a detection level into frequency signal, specifically, relates to an electric circuit controller (and an electric circuit control method) which can judge changes (frequency of the frequency signal having changed in a predetermined level or the frequency of the cover detecting signal having reached the predetermined value) such as current or the voltage by simple structure.

(Invention C): The present invention relates to the delay circuit (and a delay circuit system) comprising a plurality of impedance circuits connected to a gland in the path of the input signal, specifically, relates to a delay circuit (and a delay circuit system) which minute delay can be generated and can perform a circuit design easily.

BACKGROUND ART

(Invention A): A technique to detect that frequency of the measuring signal reached reference frequency is known conventionally. In this technique, at first the periodic signal of the reference is generated, and, then, the phase of this reference periodic signal and the phase of the measuring signal are compared. In this kind of technique, Recursive Discrete Fourier Transform may be used (patent document 1). Also, an AFC (Automatic Frequency Control) loop may be used (patent document 2).

(Invention B): As shown in FIG. 34, the power conversion equipment 9 possesses power converters 91, the periodic signal generation circuit 92 and the driving signal generation circuit 93. The power converters 91 converts direct current power from power supply 81 into AC power or direct current power, and the converted output (direct current power or AC power) is supplied to load 82 (cf. patent document 3).

The periodic signal generation circuit 92 inputs an output signal from power converters 91, and converts this voltage value into a periodic signal. Driving signal generation circuit 93 has average calculation circuit. Average calculation circuit counts signal input from the periodic signal generation circuit 92. Average calculation circuit calculates mean value of predetermined period of output voltage. Driving signal generation circuit 93 drives an electric switch of power converters 91 depending on a calculation result of the averaging circuit.

(Invention C): The delay circuits are usually comprised of a large number of delay elements performed series connection of, the delayed signals are acquired by a tap provided between each elements. Detecting circuit integrates input signal of rectangular wave, when capacitor voltage to comprise integrating circuit reached the threshold, delayed signals occur.

Method to generate delayed signals is shown in FIG. 45. In FIG. 45, delay circuit 8 is comprised of a plurality of delay formative elements (81 1 81 ( )-(N)). A plurality of lines (line group 83) are drawn out from selective circuit 82 (cf. patent document 4).

-   Line of signal S0 in input signal path -   Line of output side (signal S1) of delay formative element 81 (1) -   Line of output side (signal S2) of delay formative element 81 (2) .     . . -   Line of output side (signal SN) of delay formative element 81 (N)

Selective circuit 82 selects one or more lines from a plurality of lines (line group 83). Different signal (original signal SO, delayed signals S1, S2, . . . , either of SN) of the delay time is thereby taken out.

[Advanced Technology Literature] [Patent Document]

-   [patent document 1] JP2003-344463 -   [patent document 2] JP1995-154435 -   [patent document 3]JP2002-330545 -   [patent document 4] JP1990-141029

DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention

(Invention A): In each conventional technique, reference signal generator, phase detector are necessary. Thus, there is problem that overall circuit is complicated.

(Invention B): As mentioned earlier, using the power conversion equipment 9 of FIG. 34, mean value in scheduled periods such as voltage can be detected. However, using power conversion equipment 9, voltage instantaneous value cannot be detected. It is not illustrated, but, in the power conversion equipment of the current control type, current value is converted into a voltage value, and this voltage value is converted into a periodic signal. Using this periodic signal, a current peak is detected, and the current of power converters is controlled. In this case, the current peak is supposed from the mean of current value converted into a voltage signal.

That is, by the conventional control (control of the voltage-controlled power conversion equipment and control of the current control type power conversion equipment), instantaneous value of the voltage and instantaneous value of the current peak cannot be detected. Thus, highly precise control was not able to be simplified.

(Invention C): A delay formative element must be used more than 1000 to raise resolution with the delay circuit of FIG. 45 (i.e., N is “1000” or more). In this case, correct delay is not generated when the distances between each delay formative elements are different. Also, correct delay cannot be generated when length of each lines from each delay formative element to selective circuit 82 is different. As a practical matter, the distance between the delay formative element is different from selective circuit 82. Also, the length of each lines from each delay formative element to selective circuit 82 cannot be equated.

In reality, it is not easy to set the delay time precisely (e.g., setting a large number of delay every several nanoseconds). In manufacturing process of integrated circuit, delay formative elements 81 (1)-81 (N) 1,000 or more must be made on semiconductor substrate as described above. Distance between each delay formative elements must be the same as possible as described above, besides. Also, length of each lines from each delay formative element to selective circuit 82 must be made the same as much as possible as described above. Thus, pattern design of integrated circuit is extremely difficult.

(Object of “invention A”): Object of “invention A”(the frequency detection apparatus and frequency detection methods) is to compare second periodic signal (signal which delayed from measurement signal for predetermined time)with first periodic signal (measurement signal), and is to judge that the frequency have dropped in predetermined value of the low level side.

(Object of “invention B”): Object of “invention B” is that change (frequency of measurement signal having risen to predetermined value of the high pass side) of the control parameter can be determined in simple structure and highly precise control provides the power conversion equipment which it is possible for.

Other objects of “invention B” are to provide control method of the power conversion equipment. Other objects of “invention B” is that change (frequency of measurement signal having fallen to predetermined value of drop direction side) of the control parameter can be determined in simple structure and highly precise control provides the power conversion equipment which it is possible for. Other object of “invention B” is to provide control method of the power conversion equipment.

(Object of “invention C”): Object of “invention C” is accuracy generates high delay and to provide delay circuit that circuit design is easy and delay circuit system.

(Invention A): In the frequency detection apparatus comprising the delayed signal output circuit and judgment circuit, the delayed signal output circuit outputs second periodic signal which delayed in first periodic signal that frequency changes at time for predetermined time, the judgment circuit inputs first periodic signal and second periodic signal, the judgment circuit detects it whether first period period of a signal was included for second period period of a signal and/or whether above second period period of a signal was included for above first period period of a signal, and judge signal is output,

The delayed signal output circuit outputs second periodic signal which delayed in first periodic signal that frequency changes at time for predetermined time, the judgment circuit inputs first periodic signal and second periodic signal, detects whether first period included period of a signal for period of a signal in second period, and judgment signal is output, and/or, the judgment circuit detects whether second period included period of a signal for period of a signal in first period, and judgment signal is output.(???????????)

The delayed signal output circuit can be comprised by analog circuit. Also, the delayed signals output circuit can be comprised by a digital circuit. In delay time, it can be set appropriately. The first periodic signal (measuring signal) is typically a narrow width pulse string, rectangular wave, serrulation wave, triangular wave, sine wave.

Pulse separation changes when first periodic signal is narrow width pulse string.

When the narrow width pulse string of first periodic signal is an original or negative pulse, the judgment circuit detects whether the narrow width pulse of first periodic signal and the narrow width pulse of second periodic signal are input alternately. And the judgment circuit is judged to be it whether second period period of a signal is included for first period period of a signal.

Alternatively, the judgment circuit is judged to be it whether first period period of a signal is included for second period period of a signal. For example, the judgment circuit detects only a positive pulse or a negative pulse as first periodic signal, and a positive pulse and the case including two pulses of the negative pulse can output judgment signal to one period a narrow width pulse string.

The judgment circuit can be judged when first periodic signal is squarewave whether first period includes period of a signal by an edge (a positive going edge or a negative-going edge) in second period for period of a signal. Alternatively, the judgment circuit can be judged whether period of a signal is included by the edge in first period for period of a signal in second period. The judgment circuit can be judged when first periodic signal is serrulation wave whether first period includes period of a signal by an edge (or a maximum of the serrulation amplitude of wave) in second period for period of a signal. Alternatively, the judgment circuit can be judged whether the period of first pulse is included for period of a signal in second period.

When first periodic signal is a triangular wave and a sine wave, the judgment circuit can be judged whether period of a signal is included by a peak (a maximum and a minimum) in second period for period of a signal in first period. Also, the judgment circuit can be judged whether first period includes period of a signal by a zero point in second period for period of a signal. The judgment circuit can be judged whether period of a signal is included by a zero point in first period for period of a signal in second period. In “invention A”, it can be determined to have changed into a predetermined level of the high pass side by frequency. In “invention A”, it can be determined to have reached the set value of the rise direction side by frequency. The frequency at that time is reciprocal of the delay time. Thus, when delay time is determined by at least one detection level, that frequency changes in a predetermined level of the high pass side or frequency changed into a predetermined level of the low level side can be detected.

(2) The frequency detection apparatus as claimed in (1), wherein, the judgment circuit detects time when first period included period of a signal for period of a signal in second period, thereby, judges that the frequency of first periodic signal changed in a predetermined level of the high pass side or that it rose to the predetermined value, and/or, the judgment circuit detects time when second period included period of a signal for period of a signal in first period, thereby, judges that the frequency of first periodic signal changed in a predetermined level of the low level side or that it dropped in predetermined value, a frequency detection apparatus.

In the frequency detection apparatus of “invention A”, time A tau can delay first periodic signal by delayed signals output circuit. And, as for the spacing of the narrow width pulse (or edges) of first periodic signal, it is with Δτ/i(an integer positive in i=1,2, . . . , J, J) when period of a signal was included in second period for period of a signal in first period.

And, as for the spacing such as the narrow width pulse of second periodic signal, the edge, it is with jΔτ(an integer positive in j=1/I, . . . , one-third, half, 1, I) when period of a signal was included in first period for period of a signal in second period.

When the frequency of first periodic signal changed in a predetermined level of the high pass side, first period includes period of a signal in second period for period of a signal.

Alternatively, period of a signal is included in second period for period of a signal in first period when the frequency of first periodic signal reached place set value of the rise direction side. When the frequency of first periodic signal changed in a predetermined level of the low level side, second period includes period of a signal in first period for period of a signal. Alternatively, second period includes period of a signal in first period for period of a signal when the frequency of first periodic signal reached the place set value of the drop direction side. Thus, in “invention A”, the frequency of first periodic signal dropped, and the lower limit was reached, or it is distinguished, and it can be determined whether frequency rises, and the upper limit was reached.

In “invention A”, as for the judgment circuit, first periodic signal is a narrow width pulse string. This narrow width pulse string includes a positive pulse and two pulses of the negative pulse in period. When the distance of the pulse of these pluses and minus is 180 degrees, or, when the duty of first periodic signal is 50%, it can be detected whether the half period of first periodic signal was included for the half period of second periodic signal. Alternatively, it can be detected whether in this case the half period of second periodic signal was included for the half period of first periodic signal.

For example, it is supposed that first periodic signal (measuring signal) is supposed to be a narrow width pulse string, and this narrow width pulse string also includes a positive pulse and two pulses of the negative pulse in frequency, and, even more particularly, it is supposed that the spacing of the pulse of these pluses and minus is 180 degrees. In this case, the judgment circuit can determine both positive pulse and negative pulses as a pulse (an equivalent pulse) of the same property. The judgment circuit outputs the judgment signal which responded to a judgement result.

Also, the judgment circuit can detect both positive going edge and negative-going edges as an edge (an equivalent edge) of the same property when first periodic signal is squarewave, and a duty is 50%. Even more particularly, the judgment circuit can detect the both sides of a positive pulse and the negative pulse as a pulse (an equivalent pulse) of the same property when first periodic signal is a triangular wave and a sine wave, and the spacing of a maximum of the magnitude and the minimum is 180 degrees.

A frequency detection apparatus as claimed in (2), wherein

the judgment circuit, when that period of a signal was included for period of a signal in second period in first period was detected, that the frequency of first periodic signal changes into a predetermined level of the high pass side depending on the detected number of times or it rose to the predetermined value is judged.

When period of a signal detected that it was included for period of a signal in second period in first period, the judgment circuit performs the judgment that responded to the number of times.

By first detection, the period is delay time Δτ/1,

By second detection, period is delay time Δτ/2,

By the detection of a thing of a beginning, period is delay time Δτ/I

It is thereby judged the frequency of first periodic signal changes into a predetermined level of the high pass side or to have reached the place set value of the rise direction side.

(4) When, as for the judgment circuit, Δτ meets a lower formula, T1+T2+ . . . TJ<=Δτ<T1+T2+ . . . TJ+TJ+1 (an integer positive in Tk (k=J, k-th pulse of first periodic signal as for . . . , 3,2,1), J),

When period of a signal detected that it was included for period of a signal in first period in second period, It is judged that the frequency of the Δτ=J, . . . , 3,2,1) first periodic signal changes into a predetermined level of the high pass side (1/j) in delay time or period rose to the predetermined value.

The specific handling of judgment circuit is as follows:

As for the judgment circuit, period judges that the frequency of first above periodic signal changed into a predetermined level of the high pass side by a certain delay time Δτ/J in first detection. Alternatively, the judgment circuit judges that period reached the value with the frequency of first above periodic signal by the delay time Δτ/J that there is in first detection. The judgment circuit judges that the frequency of first periodic signal changed into a predetermined level of the high pass side by delay time Δτ/(J−1) with the period (or having reached the place set value of the rise direction side) in second detection. The judgment circuit judges that the frequency of first periodic signal changed into a predetermined level of the high pass side by delay time Δτ with the period (or having reached the place set value of the rise direction side) in the detection of the J joint likewise.

(5) A frequency detection apparatus as claimed in (1),

wherein the delay circuit inputs first periodic signal, and second periodic signal is output, is initialized.

(6)(1) A frequency detection apparatus to assume a frequency detection apparatus as claimed in (5) either hot 1 unit, wherein,

the R units (first—the Rth) are connected in parallel, in which first periodic signal is common,

a delay time Δτ1 to first periodic signal of second periodic signal in first unit,

a delay time Δτ1 to first periodic signal of second periodic signal in second unit, . . .

a delay time Δτ1 to first periodic signal of second periodic signal in the R-th unit, are different each other.

(7) A frequency detecting device that the frequency detecting apparatus discribed in either of (1)-(5) is defind as one unit, wherein,

1st-Rth units are connected to in parallel,

A delay time Δτ to first periodic signal of second periodic signal in each unit is the same, the phase of each first periodic signal in 1st-Rth unit is different by 2π/R.

(8) The first periodic signal is performed voltage—frequency conversion of. A frequency detection apparatus as claimed in claim 1, wherein, first periodic signal is performed voltage-frequency conversion of.

(9) A frequency detection methods that second periodic signal delaying to first periodic signal from first periodic signal that frequency changes at time for predetermined time is generated, and this is output,

Frequency Detection Methods

The frequency detection methods including judging that the frequency of the above first periodic signal changes into a predetermined level of the low level side by detecting time when that the frequency of the above first periodic signal changes into a predetermined level of the high pass side by detecting time when first period included period of a signal for period of a signal in second period or it rose to the predetermined value is judged and/or period of a signal was included for period of a signal in above first period in above second period or it dropped in predetermined value.

(10) When that period of a signal was included for period of a signal in second period in first period was detected, depending on the number of times, period is Δτ/i by the detection of i turn eyes the frequency of first above periodic signal in delay time

(an integer positive in i=1,2, . . . , I, I) Well, the frequency detection methods as claimed in (9) including judging that frequency of first periodic signal F1 changes in a predetermined level of the high pass side or the place set value of the rise direction side was reached.

(11) In a case of T1+T2+ . . . TJ<=Δτ<T1+T2+ . . . TJ+TJ+1, including judging that the frequency of first above periodic signal changes in a predetermined level of the high pass side by delay time or period reached the place set value of the rise direction side in j-th detection when that second period included period of a signal for period of a signal in first period was detected or it is frequency detection methods as claimed in (10)(9).

(12) Whenever first periodic signal is input, and second periodic signal is output, a frequency detection methods as claimed in either of (9)-(11) including the deference of second periodic signal being initialized.

(13) A frequency detection method as claimed in either of (9)-(12) including first periodic signal being performed voltage-frequency conversion of.

(Invention B): (1) The electric circuit controller comprising driving signal generation circuit, periodic signal generation circuit and the frequency detecting circuit, wherein

the driving signal generation circuit drives at least one electric switch included in the electric circuit,

the periodic signal generation circuit detects an electric information (voltage/current/electric power/phase) changing than the electric switch being driven more than one or one, and a periodic signal is generated from at least one electric information chosen by these detecting signals, and this is output as first periodic signal,

the delayed signals generation circuit outputs second periodic signal which retarded first periodic signal for predetermined time,

the judgment circuit detects whether first periodic signal and second periodic signal are input, and period of a signal was included for period of a signal in above second period in above first period and/or whether period of a signal was included for period of a signal in above first period in above second period, and judgment signal is output.

The periodic signal generation circuit can detect the following quantity of electricity as “current flowing or the voltage in the appointed part or voltage drop in an appointed part”.

Input current, input voltage, output current, output voltage, electric reactor voltage, electric reactor current, electric switch voltage, electric switch current, diode voltage, diode current.

The electric circuit controller of “invention B” may be the voltage-controlled, and even current control type is preferable. The electric switch comprising a power circuit is semiconductor switch such as a bipolar transistor, the FET transistor. The periodic signal which periodic signal generation circuit produces is typically a narrow width pulse string, a rectangular wave, serrulation wave, a triangular wave, a sine wave. Delayed signals generation circuit may be an analog circuit, and it may be a digital circuit. In delay time, it is set appropriately.

The spacing of the pulse changes when first periodic signal which periodic signal generation circuit produces is a narrow width pulse string. When the narrow width pulse string of first periodic signal is an original or negative pulse, the judgment circuit monitors whether the narrow width pulse of first periodic signal and the narrow width pulse of second periodic signal are input alternately. And the judgment circuit can be judged whether period of a signal is included in second period for period of a signal in first period. Alternatively, the judgment circuit can be judged whether period of a signal is included in first period for period of a signal in second period. For example, the judgment circuit detects only a positive pulse in a positive pulse and the case including two pulses of the negative pulse as first periodic signal, and a narrow width pulse string can output judgment signal in one period.

The judgment circuit can monitor an edge (a positive going edge and a negative-going edge) when first periodic signal is squarewave. The judgment circuit can be judged whether period of a signal is included in second period for period of a signal or whether first period includes period of a signal in first period for period of a signal in second period.

The judgment circuit monitors an edge (a positive going edge and a negative-going edge) when first periodic signal is serrulation wave or a maximum of the serrulation amplitude of wave can be watched. The judgment circuit can be judged whether period of a signal is included in second period for period of a signal or whether first period includes the period of first pulse for period of a signal in second period.

The judgment circuit can monitor, for example, a peak (a maximum and a minimum) and a zero point when first periodic signal is a triangular wave and a sine wave. The judgment circuit can be judged whether period of a signal is included in second period for period of a signal or whether first period includes period of a signal in first period for period of a signal in second period. In “invention B”, it can be determined to have reached the predetermined value by frequency. The frequency at that time is reciprocal of the delay time.

Thus, in a certain control system, delay time can detect the frequency when frequency reached the predetermined value when it is determined by at least one detection value. That is, in this case current corresponding to the frequency and value (peak (maximum and minimum)) of the voltage can be detected.

(2) An electric circuit controller as claimed in (1), wherein, the electric signal are selected from below group:

The input voltage of the electric circuit,

The input voltage of the electric circuit,

Voltage emerging to an element comprising the electric circuit or equipment, the element or above equipment current flowing,

The output voltage of the electric circuit,

The output current of the electric circuit.

(3) The electric circuit controller which was described in (1) or (2), wherein,

it is retarded without being based on the change of the electric information or the delayed signals generation circuit retards first periodic signal based on at least one of the above electric information, and an above second periodic signal is output.

(4) An electric circuit controller as claimed in (1), wherein,

that the frequency of the above first periodic signal dropped in predetermined value because the frequency detecting circuit judges that the frequency of the above first periodic signal rose to the predetermined value because the judgment circuit detects time when period of a signal was included for period of a signal in above second period in first period and/or above judgment circuit detects time when period of a signal was included for period of a signal in above first period in above second period is judged.

In “invention B”, the frequency detecting circuit can delay a periodic signal by delayed signals generation circuit only at a certain time Δτ. In this case, first period includes period of a signal in second period for period of a signal when the spacing of the edge of the periodic signal is Δτ. Alternatively, period of a signal is included in first period for period of a signal in this sometimes second period. When when period of a signal was included in second period for period of a signal in first period, the frequency of first periodic signal rose to the predetermined value. When when period of a signal was included in first period for period of a signal in second period, the frequency of first periodic signal dropped to a place set value of the drop direction side. Thus, as for the frequency detecting circuit, the frequency of first periodic signal rose, and the above place set value was reached, or it can draw a sharp line whether it drops, and the above place set value was reached.

Note that the spacing of a narrow width pulse and the edge of first periodic signal is as follows when period of a signal was included in second period for period of a signal in first period.

Δτ/i (i=1,2, . . . , J, J is an integer)

Also, the spacing of a narrow width pulse and the edge of second periodic signal is as follows when period of a signal was included in first period for period of a signal in second period.

jΔτ(j=1/I, . . . , ⅓, ½, 1, I is ingeger)

The first periodic signal is a narrow width pulse string. This narrow width pulse string may include a positive pulse and a negative pulse of the 180 degrees spacing in one period. Also, the duty of first periodic signal may be 50%. In these cases, the judgment circuit can be detected whether the half period of first periodic signal was included for the half period of second periodic signal and/or whether the half period of second periodic signal was included for the half period of first periodic signal.

For example, the judgment circuit can judge the both sides of a positive pulse and the negative pulse as a pulse (an equivalent pulse) of the same property in a positive pulse of the 180 degrees spacing and the case including the negative pulse in one period a narrow width pulse string.

Also, both positive going edge and negative-going edges is done with the edge (an equivalent edge) of the same property, and the judgment circuit can be judged when the duty of first periodic signal is 50%. Even more particularly, the judgment circuit can judge the both sides of a positive pulse and the negative pulse as a pulse (an equivalent pulse) of the same property when first periodic signal is a triangular wave and a sine wave, and the spacing of a maximum of the magnitude and the minimum is 180 degrees.

(5) An electric circuit controller as claimed in (1)-(2), wherin,

the judgment circuit, when that first period included period of a signal for period of a signal in second period was detected, that the frequency of first periodic signal changes in a predetermined level of the high pass side by the i-th detection by delay time with the period or the frequency of the above first periodic signal reached the place set value of the rise direction side depending on the number of times is judged.

the delay time Δτ/i (an integer positive in i=1,2, . . . , I, I):

(6) An electric circuit controller as claimed in either from (1) to (5) including the judgment circuit judging that the frequency of the above first periodic signal changes in a predetermined level of the high pass side in Δτ(j=J, . . . , 3,2,1) (1/j) in delay time or period reached the place set value of the rise direction side in j-th detection when that period of a signal was included for period of a signal in above first period in second period was detected in a case of T1+T2+ . . . +TJ<=Δτ<T1+T2+ . . . +TJ+TJ+1 (an integer positive in J).

(7) Whenever the delay circuit inputs first periodic signal, and second periodic signal is output, an electric circuit controller as claimed in either from (1) from to (7) including what is initialized.

(8) A frequency detecting circuit comprising an electric circuit controller as claimed in either of hot is done with 1 unit, and it is the electric circuit controller comprising the frequency detecting circuit that it is made a common use of in an above first periodic signal, and R unit is connected from first unit in parallel, and it is, and in the delay time to first periodic signal of second periodic signal in first unit in the delay time to first periodic signal of second periodic signal in Δτ1 and second unit Δτ2, . . .

An electric circuit controller of the description including ΔτR being different in the delay time to first periodic signal of second periodic signal in the R unit.

(9) A frequency detecting circuit comprising an electric circuit controller as claimed in (1)-(7) is done with 1 unit, and it is the electric circuit controller comprising the frequency detecting circuit that it is made a common use of in an above first periodic signal, and R unit is connected from first unit in parallel, and it is, and in the delay time to first periodic signal of second periodic signal in first unit in the delay time to first periodic signal of second periodic signal in Δτ1 and second unit Δτ2, . . .

an electric circuit controller of the description including ΔτR being different in the delay time to first periodic signal of second periodic signal in the R unit.

(10) Because the electric circuit is AC/DC power inverter circuit of current control type or the voltage-controlled or DC/DC power inverter circuit, and the electric information is characterized by being chosen voltage appearing to the input voltage of the electric circuit, the input voltage of the above electric circuit, an element comprising an above electric circuit or the equipment, an above element or above equipment by current flowing, the output voltage of the above electric circuit, the group of the output current of the above electric circuit, an electric circuit controller as claimed in either from (1) to (9).

(11) A periodic signal is generated from an electric information of at least one that an electric information (voltage/current/electric power/a phase) changing by the drive of the electric switch of at least one included in the electric circuit is detected more than one or one, and was chosen by these measuring signal, and it is a method to control an electric circuit by detecting the frequency of the note periodic signal, and in detection of the above frequency,

The electric circuit control method including it is detected whether second periodic signal which retarded first periodic signal for predetermined time is generated, and first periodic signal and above second periodic signal are input, and period of a signal was included for period of a signal in above second period in above first period and/or whether period of a signal was included for period of a signal in above first period in above second period, and judgment signal is output, and driving an above electric switch depending on the judgement result.

(12) The electric circuit control method as claimed in (11) including being chosen voltage appearing to the input voltage of the electric circuit, the input voltage of the electric circuit, an element comprising an above electric circuit or the equipment, an above element or above equipment as the electric information by current flowing, the output voltage of the above electric circuit, the group of the output current of the above electric circuit.

(13) Including it is retarded without being based on the change of the electric information or first periodic signal is retarded based on at least one of the above electric information, and outputting an above second periodic signal or it is an electric circuit control method as claimed in (12) (11).

(14) An electric circuit control method as claimed in either from (11) to (13) including judging that the frequency of the above first periodic signal changes in a predetermined level of the low level side because the frequency of the above first periodic signal detects time when that it changes or the place set value of the rise direction side was reached is judged and/or a predetermined level of the high pass side included period of a signal for period of a signal in above first period in above second period by detecting time when first period included period of a signal for period of a signal in second period or the place set value of the drop direction side was reached.

(15) An electric circuit control method as claimed in either from (11) to (14) including the frequency of the above first periodic signal judging that the frequency of first periodic signal changes in a predetermined level of the high pass side in Δτ/i (an integer positive in i=1,2, . . . , I, I) in delay time or period reached the place set value of the rise direction side by the i-th detection depending on the number of times when that first period included period of a signal for period of a signal in second period was detected.

(16) The first period period of a signal,

T1+T2+ . . . +TJ<=Δτ<T1+T2+ . . . +TJ+TJ+1 (an integer positive in J) An electric circuit control method as claimed in either from (11) to (15) including judging that the frequency of the above first periodic signal changes in a predetermined level of the high pass side in Δτ=J, . . . , 3,2,1) (1/j) in delay time or period reached the place set value of the rise direction side in j-th detection when that second period included period of a signal for period of a signal in first period was detected in

case.

(Invention C): (1) The delay circuit including the delay time when an above detecting circuit generates by one end is connected to the input signal path of the detecting circuit, and other end is a delay circuit having an impedance circuit connected to a gland, and a plurality of electric switches to change the overall impedance of the above impedance circuit into when an on control signal or an off control signal was input, respectively, be included in an above impedance circuit, and changing the impedance of the above impedance circuit by the combination of the ON state of the electric switch of plural above or the off state changing.

(2) The delay circuit as claimed in (2) including the thing including impedance (a resistance ingredient, a capacity ingredient, an inductance ingredient) that the electric switch of plural at least above has the impedance circuit and/or the impedance due to the electric wiring.

(3) The impedance circuit including the thing including a resistance element, a capacitative element, one of the inductance elements or combinations thereof or it is a delay circuit as claimed in (2) (1).

(4) A delay circuit as claimed in either from (2) to (3) including the electric switch being a gate electric switch (the buffer with the control terminal)

(5)(1) The delay circuit system including the thing comprising the delay control circuit which sends out an ON-OFF control signal to a delay circuit as claimed in (4) either hot and each electric switch.

(6) The delay circuit including the delay time when an above detecting circuit generates by one end is connected to the input signal path of the detecting circuit, and other end is a delay circuit having a plurality of impedance circuit element connected to a gland, and open position is formed between an above input signal path and an above gland when an on control signal was input, and the electric switch which forms impedance between an above input signal path and an above gland when an off control signal was input be included in each impedance circuit element, respectively, and changing the impedance of the above impedance circuit by the combination of the ON state of each electric switch or the off state changing.

(7) The delay circuit as claimed in (6) including the thing including impedance (a resistance ingredient, a capacity ingredient, an inductance ingredient) that at least electric switch has the impedance circuit element and/or the impedance due to the electric wiring.

(8) The impedance circuit element including the thing including a resistance element, a capacitative element, one of the inductance elements or combinations thereof or it is a delay circuit as claimed in (7) (6).

(9) A delay circuit as claimed in either from (6) including impedance is P unit comprised delay circuit in Z (1), Z (2), . . . , impedance circuit element of Z (N), respectively, and being represented unit delay time as τ zero in Tk (Z(k))=(P+1) k−1 τ0(k=1,2, . . . . , N) Tk in delay time by each impedance circuit element to (8).

(10) A delay circuit as claimed in either from (6) to (10) including the electric switch being a gate electric switch (the buffer with the control terminal)

(11) A delay circuit as claimed in either from (6) to (10) including the impedance circuit element includes a buffer, and the gland side being provided with the buffer than the electric switch.

(12) The detecting circuit is a delay circuit as claimed in either from (6) to (11) including the thing including the CR integrating circuit comprising capacitive elements and a resistance element, capacitive elements and resistance elements.

(13) (6) The delay circuit system including the thing comprising the delay control circuit which sends out an ON-OFF control signal to a delay circuit as claimed in (12) either hot and each electric switch. When frequency conversion is made, and voltage and the current of all parts are detected in an AC/DC converter, DC/DC converter, boost chopper, depression chopper, and (output current, output voltage, output power, input current, output voltage, input power) to control listing and input is controlled, the delay circuit system of “invention C” is particularly effective.

An Effect of the Invention

(Invention A): By “invention A” configuration simple (a frequency detection apparatus and frequency detection methods), second periodic signal (the signal which retarded measuring signal for predetermined time) can be compared with the measuring signal (first periodic signal). That frequency rose to predetermined value is thereby determined. Also, that frequency dropped to predetermined value is determined

(Invention B): The input current in the electric circuits such as power inverter circuits electric by simple structure, input voltage, output current, output voltage, voltage appearing to the electric reactor, an above electric reactor current flowing, voltage appearing to the above electric switch, an above electric switch current flowing, voltage appearing to the diode (a commutation diode, a rectifier diode), an above diode changes (that the frequency of the periodic signal rose to the predetermined level is detected with high accuracy.) such as the current flowing Also, that frequency of the measuring signal dropped to a predetermined value is detected.

(Invention C): According to “invention C”, setting of the delay time is enabled with high accuracy. Because it is not necessary, as for the delay circuit of “invention C”, the selective circuit (multiplexer) to select the signal which delayed appropriately from in delayed signals a lot (more than 1,000) does not have to keep a fixed lines length from each delay formative element to selective circuit 82. Also, the limit of the design is relaxed without serially-connecting a large number of delay circuit elements. Also, simplification of the circuit can be planned.

After, in “invention C”, having considered floating resistance such as the circuit wiring, floating capacitance, value of the floating inductance, it becomes easy to determine delay time (i.e., a circuit design becomes easy).

Because the production by the semiconductor process is easy, and the third state buffer of the same specifications also has little variation of the input impedance, it is preferable in “invention C”. A resistance element, a capacitative element, one or combinations of the inductance element thereof can be connected to these third state buffers.

(Invention C) According to the present invention, setting of the delay time is enabled with high accuracy. In delay circuit of the present invention, selective circuit (multiplexer) to select signal which delayed from delayed signals appropriately a lot (more than 1,000) is not necessary. Thus, it is not necessary to keep a fixed lines length from each delay formative element to selective circuit 82. Limit of design is relaxed without serially-connecting a large number of delay circuit elements. Also, simplification of circuit can be planned.

According to the present invention, after having considered floating resistance such as circuit wiring, floating capacitance, value of floating inductance, it becomes easy to determine the delay time (thus, circuit design becomes easy).

Production in semiconductor process is easy, and, in the third state buffer of the same specification, as for these, it is also preferable in the present invention because there is little variation of input impedance.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is figure showing first embodiment of the present invention, (A) is figure showing configuration of the frequency detection apparatus, (B) is detection frequency and figure showing relations with time, and (C) is figure of changing frequency.

FIG. 2 is figure showing variation of first embodiment of the present invention, (A) is figure showing configuration of the frequency detection apparatus, (B) is detection frequency and figure showing relations with time, and (C) is figure of changing frequency.

FIG. 3 is figure showing second embodiment of the present invention, (A) is figure showing configuration of the frequency detection apparatus, (B) is detection frequency and figure showing relations with time, and (C) is figure of changing frequency.

FIG. 4 is figure showing variation of second embodiment of the present invention, (A) is figure showing configuration of the frequency detection apparatus, (B) is detection frequency and figure showing relations with time, and (C) is figure of changing frequency.

FIG. 5 is figure showing third embodiment (the frequency detection apparatus having upper bound and lower limit of frequency one by one) of the present invention, (A) is figure showing configuration of the frequency detection apparatus, and (B) is detection frequency and figure showing relations with time.

FIG. 6 is figure showing state that frequency changes in the frequency detection apparatus of FIG. 5.

FIG. 7 is figure showing third embodiment (the frequency detection apparatus which plural number has upper bound and lower limit of frequency, respectively) of the present invention, (A) is figure showing configuration of the frequency detection apparatus, and (B) is detection frequency and figure showing relations with time.

FIG. 8 is figure showing state that frequency changes in the frequency detection apparatus of FIG. 5.

FIG. 9 shows the frequency detection apparatus that 2 units used the frequency detection apparatus of FIG. 1(A), and this the frequency detection apparatus is comprised so that first frequency signal becomes common

FIG. 10 is detection frequency in the frequency detection apparatus of FIG. 9 and figure showing relations with time.

FIG. 11 shows the frequency detection apparatus that 2 units used the frequency detection apparatus of FIG. 1(A), and this the frequency detection apparatus is comprised so that resolution becomes higher.

FIG. 12 is actuating figure of the frequency detection apparatus of FIG. 11.

FIG. 13 shows the frequency detection apparatus that 2 units used the frequency detection apparatus of FIG. 1(A), and this the frequency detection apparatus is comprised so that actuating range becomes wide.

FIG. 14 is actuating figure of the frequency detection apparatus of FIG. 12.

FIG. 15 is basic configuration diagram of the present invention, and, in this view, controller which does not have the delay control circuit is shown.

FIG. 16 is figure showing basic structure of the present invention, and, in this view, controller having the delay control circuit is shown.

FIG. 17 is figure showing first embodiment of the present invention (the power conversion equipment and the control method).

FIG. 18 is detailed figure of control method of three-phase power converter and the power conversion equipment.

FIG. 19 is figure showing embodiment of electric power strange container equipment of current control type.

FIG. 20(A) is figure showing time change state in all parts of the power conversion equipment, and FIG. 20(B) is figure showing change state at first frequency signal F1, time of second frequency signal F2.

FIG. 21 is figure showing example that frequency signal generator assumed the circuit current electric switch current.

FIG. 22(A) is figure showing time change state in all parts of the power conversion equipment, and FIG. 22(B) is figure showing change state at first frequency signal F1, time of second frequency signal F2.

FIG. 23 is figure showing the power conversion equipment raising appearance resolution (judgment accuracy) that two are connected in parallel, and comprised the frequency detecting circuit.

FIG. 24 is figure showing example that phase difference of first frequency signal and second frequency signal is pi in the power conversion equipment of FIG. 19, and, in this particular example, detection resolution (judgment accuracy) is figure showing state that increased twice as much.

FIG. 25 is figure showing example that frequency signal generator takes current flowing in the electric switch as circuit current.

FIG. 26 is figure showing the power converter that frequency process is divided in two by first unit or second unit, and dividing it in two is performed depending on dimension of voltage input into the range selection circuit.

FIG. 27 is figure showing the power converter that frequency process is divided in two by first unit or second unit in the power conversion equipment of FIG. 25.

FIG. 28 is figure showing the power conversion equipment operating the circuit current between upper bound and upper bound.

FIG. 29(A) is figure showing signal state of all parts of the power conversion equipment, FIG. 29(B) and (C) are figure showing state of time variation of first frequency signal and second frequency signal by pulse string.

FIG. 30 is figure showing second embodiment of the power conversion equipment of the present invention.

FIG. 31 is power conversion device behavior figure of FIG. 30. (A) is figure showing change of time of output voltage of the power converter, (B) is figure showing output frequency of frequency signal generation circuit, and (C) is figure showing pulse string that first frequency signal changes in proportion to time.

FIG. 32 is figure showing the power conversion equipment of FIG. 30 comprising two the frequency detecting circuit (2 units), the power conversion equipment has threshold value of upper bound and threshold value of lower limit.

FIG. 33(A) is figure showing time change of output voltage of the power conversion equipment, (B) is figure showing process by the judgment circuit, (C) is figure showing first frequency signal and second frequency signal that change in proportion to time in one unit, and (D) is figure showing first frequency signal and second frequency signal that change in proportion to time in the other unit.

FIG. 34 is figure of conventional the power conversion equipment.

FIG. 35 is figure showing embodiment of the present invention (delay circuit and delay circuit system).

FIG. 36 is graphic showing time change of voltage occurring in detecting circuit.

FIG. 37 is figure showing other embodiments of the present invention (delay circuit and delay circuit system).

FIG. 38 is embodiment showing delay circuit to do disintegration spacing of the delay time equally and delay circuit system using the delay circuit.

FIG. 39 is figure of delay circuit which replaced impedance circuit element of FIG. 37 with buffer and delay circuit system using the delay circuit.

FIG. 40 is figure of delay circuit that impedance circuit element is three state buffer and delay circuit system using the delay circuit.

FIG. 41 is figure showing electric wiring configuration of delay circuit shown in FIG. 38.

FIG. 42 is figure showing example which it is figure showing application of delay circuit, and delay circuit increases input clocks to 4 times by three delay circuit units.

FIG. 43 is figure showing embodiment of delay circuit of the present invention and delay circuit system applied to power conversion equipment.

FIG. 44 is figure showing other embodiments that applied delay circuit of the present invention and delay circuit system to the power conversion equipment.

FIG. 45 is figure of conventional delay circuit.

EXPLANATIONS OF THE LETTERS OF NUMERALS (Invention A)

11, 21, 31, 41A, 41B, 51A, 51B, 61A, 61B Delayed Signals Output Circuit

12, 22, 32, 42, 52, 62 Judgment Circuit

121,321 Counters

43, 53, 63 Control circuits

54 Distributing Circuits

65 Range Selective Circuits

UA, UB Frequency Detection Apparatus Unit

(Invention B):

11, 21 Power Converters

12, 22 Control Circuits

13, 13A, 13B, 23 Periodic Signal Generation Circuit

14, 24 Frequency Detecting Circuits

15, 25 Driving Signal Generation Circuit

16, 16A, 16B Delay Control Circuit

17 Phase Shift Circuit

17 Range Selective Circuits

111 Electric Switches

112 Electric Reactors

113 Current Detecting Resistance

114 Commutation Diodes

115 Capacitors

141,241 Delayed Signals Generation Circuit

142,241 Judgment Circuit

81 Power Supplies

82 Loads

(Invention C):

1 Delay Circuit

11 Detecting Circuits

12 Impedance Circuits

13 Control Circuits

14 Input Buffers

15 Input Signal Paths

SWk Electric Switch

Z (k) Impedance

Bk Buffer

r Resistance

TBk Third State Buffer

THE BEST MODE FOR CARRYING OUT THE INVENTION

(Invention A): A frequency detection apparatus of “invention A” and the embodiment of frequency detection methods are described below.

FIG. 1 is an figure showing 1st embodiment of “invention A”. In FIG. 1 (A), frequency detection apparatus 1 possesses delayed signals output circuit 11 and judgment circuit 12. The delayed signals output circuit 11 inputs 1st periodic signal F1 that frequency changes at time (frequency increases at time). The delayed signals output circuit 11 outputs 2nd periodic signal F2 where only Δτ (shorter than initial period of 1st periodic signal F1) retarded this 1st periodic signal F1 for predetermined time.

In first embodiment, as shown in FIG. 1 (C), first frequency signal F1 is set as increases in proportion to time. Also, 1st periodic signal F1 is a narrow width pulse string (thus, 2nd periodic signal F2 is a narrow width pulse string, too). It is referred 1,2,3, . . . number to the sequence of the narrow width pulse of 1st periodic signal F1 and 2nd periodic signal F2 depending on progress at time to make explanation plain in FIG. 1 (C), respectively.

First periodic signal F1 and 2nd periodic signal F2 are set, as depicted above, so that period shortens according to a harmonic progression.

The interval between the narrow width pulses of 1st and 2nd: 1 sec

The interval between the narrow width pulses of 2nd and 3rd: ½ sec

The interval between the narrow width pulses of 3rd and 4th: ⅓ sec

The judgment circuit 12 inputs 1st periodic signal F1 and 2nd periodic signal F2. Judgment circuit 12 detects whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2, and a detection result is output as judgment signal. “Period of 1st periodic signal F1 is included in period of 2nd periodic signal F2” and “Two consecutive narrow width pulses of 1st periodic signal F1 are located between two consecutive narrow width pulses of 2nd periodic signal F2” are equivalent. A former pulse may be piled up in the former narrow width pulse among two narrow width pulses to continue of 2nd periodic signal F2 among two consecutive narrow width pulses of 1st periodic signal F1. In this case, period of 1st periodic signal F1 is included in period of 2nd periodic signal F2. Also, period of 1st periodic signal F1 may not be included in period of 2nd periodic signal F2. Also, a later narrow width pulse may be piled up in the later narrow width pulse among two narrow width pulses to continue of 2nd periodic signal F2 among two consecutive narrow width pulses of 1st periodic signal F1. In this case, period of 1st periodic signal F1 may be included in period of 2nd periodic signal F2. Also, it may not be included.

It can be monitored whether a narrow width pulse of 1st periodic signal F1 and a narrow width pulse of 2nd periodic signal F2 are detected in 1st embodiment alternately. And it can be detected whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2. That is, in FIG. 1 (C), judgment circuit 12 detects a narrow width pulse of 1st periodic signal F1 and a narrow width pulse of 2nd periodic signal F2 alternately.

In 1st embodiment, as shown in FIG. 1 (B), frequency f1 of 1st periodic signal F1 increases in proportional to time. Therefore the period of first frequency signal F1 is shortened in accordance with the harmonic progression over time. In this case, it is determined that there are alternating characteristics about the following by judgment circuit 12.

-   -   “1st narrow width pulse of 1st periodic signal F1”,     -   “1st narrow width pulse of 2nd periodic signal F2”,     -   “2nd narrow width pulse of 1st periodic signal F1”,     -   “2nd narrow width pulse of 2nd periodic signal F2”,     -   “3rd narrow width pulse of 1st periodic signal F1”,     -   “3rd narrow width pulse of 2nd periodic signal F2”,     -   “4th narrow width pulse of 1st periodic signal F1”,     -   “4th narrow width pulse of 2nd periodic signal F2”,     -   “5th narrow width pulse of 1st periodic signal F1”,     -   “5th narrow width pulse of 2nd periodic signal F2”,     -   “6th narrow width pulse of 1st periodic signal F1”,

But, after “6th narrow width pulse of 1st periodic signal F1”, “7th narrow width pulse of 1st periodic signal F1” is detected. Thus, judgment circuit 12 judges that there is not alternating characteristics at this time (“upper bound detection” of FIG. 1 (B), “upper bound” reference of (C)).

In FIG. 1(C), the time when loses alternating characteristics with “narrow width pulse of first frequency signal F1” and “narrow width pulse of second frequency signal F2” is the time when “the seventh narrow width pulse of first frequency signal F1” was input into to judgment circuit 12. The decision circuit 12 can detect the time that “the period of first frequency signal F1 (period longer than Δτ)” changed shorter than Δτ. The detected time is a time that a narrow pulse of 6th or 7th was input.

In other words, in FIG. 1 (C), as for 6th narrow width pulse “of” 2nd periodic signal F2, only Δτ is late for the time that there is to 6th narrow width pulse “of the” 1st periodic signal F1. Narrow width pulse “of 6th narrow width pulse” and “7th of the” 1st periodic signal F1 will be thereby included between narrow width pulse “of 5th narrow width pulse” and “6th of” 2nd periodic signal F2. Thus, judgment circuit 12 may detect (a time when a narrow width pulse of 6th or 7th was input) in a time when “shortened than Δτ in period of the” 1st periodic signal F1.

Note that the spacing of narrow width pulse “of 5th narrow width pulse” and “6th of” 2nd periodic signal F2 has a long than Δτ and the spacing of 6th narrow width pulse “of 6th narrow width pulse” and “2nd periodic signal F2 of the” 1st periodic signal F1 is Δτ. There is 7th narrow width pulse “of the” 1st periodic signal F1 to the left by all means than 6th narrow width pulse “of” 2nd periodic signal F2. From this, it is clear that judgment circuit 12 can detect a time of when period of 1st periodic signal F1 shortened than Δτ.

As mentioned earlier, in 1st embodiment, frequency of “1st periodic signal F1” rises according to a harmonic progression. The frequency of “2nd periodic signal F2” becomes similarly higher, too. The case that frequency of “1st periodic signal F1” rose to as follows was described to make plain in 1st embodiment (FIG. 1 (B), cf. (C)).

“1 Hz, ½ Hz, ⅓ Hz, . . . ”

However, the frequency of 1st periodic signal F1 may really rise as follows.

“25*10⁶ Hz (25*10⁶+1) Hz (25*10⁶+2) Hz, . . . ”

Also, for example, the frequency of 1st periodic signal F1 may rise as follows.

“25*10⁶ Hz (25*10⁶+10) Hz (25*10⁶+20) Hz, . . . ”

As described earlier, in 1st embodiment, only Δτ can delay 2nd periodic signal F2 to 1st periodic signal F1. That a narrow width pulse interval of 1st periodic signal F1 became shorter than Δτ (in in a time when the period that was longer than Δτ shortened than Δτ namely a time of when a narrow width pulse of 6th or 7th was input) can be thereby detected.

Note that 1st periodic signal F1 can generate the periodic signal of the arbitrary waveform by passing a waveform shaping circuit. In the example above, a time of when period of 1st periodic signal F1 was included in period of 2nd periodic signal F2 can be detected. That is, judgment circuit 12 can detect “as” in a time of when frequency of 1 “periodic signal F1 rose to the predetermined value in a time of when period of the” 1st periodic signal F1 shortened than Δτ.

In the example above, the detection (a judgment) by judgment circuit 12 showed the case that was once. However, detection by judgment circuit 12 can do a judgment (the judgment of the time of when it was shorter period) like the above by multiple times, or 2nd, 3rd, . . . , I-th detection of the I joint in “invention A”.

That is, judgment circuit 12 can detect what included period of 1st periodic signal F1 in period of 2nd periodic signal F2. And that frequency of 1st periodic signal F1 reached the predetermined value can be judged what joint the detection is.

In this case, as shown in FIG. 2 (A), judgment circuit 12 includes counter 121, and counter 121 can store number of times of the detection. And judgment circuit 12 judges that frequency of 1st periodic signal F1 reached the predetermined value by detection of 2nd, and that frequency of 1st periodic signal F1 further reached the place set value of a thing of others by 3rd detection is judged. Frequency of 1st periodic signal F1 further changes in a predetermined level of the high pass side by the detection of 1st joint or a place set value of the rise direction side can further judge that it was reached.

In FIG. 2 (C), two times of judgments by judgment circuit 12 show a case to be carried out. That is, it is shown (upper bound 2nd detection) when the period of “6th narrow width pulse of 1st periodic signal F1” shortens than Δτ (upper bound 1st detection) and when the period of “the eleventh narrow width pulse of 1st periodic signal F1” shortens more from Δτ/2. In FIG. 2 (B), (C), the frequency which detection of upper bound 1st was made is shown with f1, 1, and it is shown the frequency that detection of upper bound 2nd was done with f1, 2. In FIG. 2 (B), it is shown a time of of this time in 1st “upper bound detection” and 2nd “upper bound detection”.

Note that only detection of 1st is performed unless shortest period “of the” 1st periodic signal F1 becomes lower than half of longest period “of the” 1st periodic signal F1 (unless maximum frequency “of the” 1st periodic signal F1 is as above 2 times of smallest frequency “of the” 1st periodic signal F1). When a change of the frequency is small, the detection after 2nd by judgment circuit 12 does not have to consider. For example, the detection after 2nd joint is not done when frequency of 1st periodic signal F1 changes in the range of 40 MHz from 25 MHz.

FIG. 3 is an figure showing 2nd embodiment of “invention A”. In FIG. 3 (A), frequency detection apparatus 2 possesses delayed signals output circuit 21 and judgment circuit 22. Delayed signals output circuit 21 inputs 1st periodic signal F1 that frequency changes at time (it goes low). And this 1st periodic signal F1 predetermined time Δτ(Δτ:Second periodic signal F2 which only) retarded in the time that is longer than initial period for 1st periodic signal F1 is output.

In 2nd embodiment, as for judgment circuit 22, Δτ has following relation in during starting (at the time of detection processing initiation) of frequency detection apparatus 2 as indicated in FIG. 3 (C) in delay time.

T1≦Δτ<T1+T2

Also, it is set the frequency of 1st periodic signal F1 is proportional from frequency 13 Hz at time, and to go low, and period gets longer according to a harmonic progression. Also, it is set the frequency of 1st periodic signal F1 is proportional from frequency 13 Hz at time, and to go low, and period gets longer according to a harmonic progression. Also, as shown in FIG. 3 (C), 1st periodic signal F1 is a narrow width pulse string like 1st embodiment (thus, 2nd periodic signal F2 is a narrow width pulse string, too). It is referred 1,2,3, . . . number to a narrow width pulse string of 1st periodic signal F1 and a narrow width pulse string of 2nd periodic signal F2 depending on progress at time to make explanation plain in FIG. 3 (C), respectively.

First periodic signal F1 and 2nd periodic signal F2 are as follows, as depicted above, because it is set so that period gets longer in a harmonic progression from frequency 13 Hz:

-   -   The interval between the narrow width pulses of 1st and 2nd:         1/13 sec     -   The interval between the narrow width pulses of 2nd and 3rd:         1/12 sec     -   The interval between the narrow width pulses of 3rd and 4th:         1/11 sec . . .

Judgment circuit 22 inputs 1st periodic signal F1 and 2nd periodic signal F2. Judgment circuit 22 detects whether period of 2nd periodic signal F2 was included in period of 1st periodic signal F1, and judgment signal is output. “Period of 2nd periodic signal F2 is included in period of 1st periodic signal F1” and “Two consecutive narrow width pulses of 2nd periodic signal F2 are located between two consecutive narrow width pulses of 1st periodic signal F2” are equivalent. A former narrow width pulse may be piled up in the former narrow width pulse among two narrow width pulses to continue of 1st periodic signal F1 among two consecutive narrow width pulses of 2nd periodic signal F2. Also, a later narrow width pulse may be piled up in the later narrow width pulse among two narrow width pulses to continue of 1st periodic signal F1 among two consecutive narrow width pulses of 2nd periodic signal F2. These are permitted in a judgment whether or not period of 2nd periodic signal F2 was included in period of 1st periodic signal F1.

In this embodiment, it is monitored whether a narrow width pulse of 1st periodic signal F1 and a narrow width pulse of 2nd periodic signal F2 are detected alternately. It is thereby detected whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2. That is, as shown in FIG. 3 (C), judgment circuit 22 detects a narrow width pulse of 1st periodic signal F1 and a narrow width pulse of 2nd periodic signal F2 alternately.

In this embodiment, as shown in FIG. 3 (B), the frequency of first frequency signal f1 decreases in proportional to time. It thereby gets longer in a harmonic progression according to progress at time in period of 1st periodic signal F1.

“The 1st narrow width pulse of 1st periodic signal F1”,

“2nd narrow width pulse of 1st periodic signal F1”,

“1st narrow width pulse of 2nd periodic signal F2”,

“3rd narrow width pulse of 1st periodic signal F1”,

“2nd narrow width pulse of 2nd periodic signal F2”,

“4th narrow width pulse of 1st periodic signal F1”,

“3rd narrow width pulse of 2nd periodic signal F2”,

“5th narrow width pulse of 1st periodic signal F1”,

“4th narrow width pulse of 2nd periodic signal F2”,

“6th narrow width pulse of 1st periodic signal F1”,

“5th narrow width pulse of 2nd periodic signal F2.”

However, judgment circuit 22 determines that there are not alternating characteristics when 6th narrow width pulse of,” 2nd periodic signal F2 was detected (“lower limit detection” of FIG. 3 (B), “lower limit” reference of (C)). However, the alternating characteristics with 1st and 2nd of 1st periodic signal F1 are ignored.

That is, when, in a time of when alternating characteristics with a narrow width pulse of 1st periodic signal F1 and the narrow width pulse of 2nd periodic signal F2 disappeared, 6th narrow width pulse of 2nd periodic signal F2 was input into judgment circuit 22 in FIG. 3 (C). Judgment circuit 22 may detect a time of when (the period when it is shorter than A r) was for longer than Δτ in period of 2nd periodic signal F2. This time is in a time when the narrow width pulse of 5-6 joints of 2nd periodic signal F2 was input or a time when the narrow width pulse of 6-7 joints of 1st periodic signal F1 was input.

In other words, in FIG. 3 (C), as for 6th narrow width pulse of 2nd periodic signal F2, only A is late for time to 6th narrow width pulse of 1st periodic signal F1. “The 5th narrow width pulse of 2nd periodic signal F2” and “6th narrow width pulse” are thereby included between “6th narrow width pulse of 1st periodic signal F1” and 7th narrow width pulses. Thus, judgment circuit 22 can detect a time when period of 2nd periodic signal F2 became for longer than Δτ. This time “is in” a time when period of 1st periodic signal F1 was for longer than Δτ “or a time when a narrow width pulse of 6th to 7th of 1st periodic signal F1 was input”.

As mentioned earlier, in 2nd embodiment, frequency of 1st periodic signal F1 depends on the harmonic progression, and it goes low. Thus, the frequency of 2nd periodic signal F2 goes low in a harmonic progression, too. Frequency of 1st periodic signal F1 described a case to go low like “ 1/13 Hz, 1/12 Hz, 1/11 Hz, . . . ” to make plain in 2nd embodiment (FIG. 3 (B), cf. (C)). As a practical matter, “Hz may become low in the frequency of 1st periodic signal F1 like Hz, . . . 25*106 Hz (25*106−2)” (25*106−1). Also, for example, “Hz may become low in the frequency of 1st periodic signal F1 like Hz, . . . 25*106 Hz (25*106−20)” (25*106−10).

As described earlier, in “invention A”, only Δτ delays 2nd periodic signal F2 to 1st periodic signal F1. That a narrow width pulse interval of 1st periodic signal F1 was delay time for longer than Δτ can be thereby detected. In other words, a time when a narrow width pulse interval of 1st periodic signal F1 was for longer than Δτ in delay time can be detected.

Note that 1st periodic signal F1 comprising narrow width pulses can generate the periodic signal of the arbitrary waveform by passing a waveform shaping circuit. In the example above, a time when period of 2nd periodic signal F2 was included in period of 1st periodic signal F1 was detected. That is, by a time when it was for longer than Δτ period of 1st periodic signal F1 which judgment circuit 22 had a shorter than Δτ in during starting (at the time of detection processing initiation) of frequency detection apparatus 2, predetermined value can judge that it dropped frequency of 1st periodic signal F1.

That is, in 2nd embodiment, Δτ has next relation in during starting of frequency detection apparatus 2 as indicated in FIG. 3 (C) in delay time. T1<=Δτ<T1+T2 (1) When what included period of 2nd periodic signal F2 in period of 1st periodic signal F1 was detected, period of 1st periodic signal F1 becomes higher than Δτ. That frequency of 1st periodic signal F1 changes in a predetermined level of the low level side or the place set value of the drop direction side was reached is judged. The detection (a judgment) by judgment circuit 22 of this case is once.

In 2nd embodiment, detection by judgment circuit 22 can do a judgment (the judgment of the time when it was shorter period) like the above by multiple times or 2nd, 3rd, . . . , detection of the J joint. That is, in during starting (at the time of detection processing initiation) of frequency detection apparatus 2, Δτ may be T1+T2+TJ<=Δτ<T1+T2+TJ+TJ+1 (2) in delay time (in the case of (1) expression at the time of J=2). Here, in Tk (k=1,2, . . . , J, J+1), k-th pulse of 1st periodic signal, J are positive integers.

For example, in the case of J=3, as for judgment circuit 22, frequency of 1st periodic signal F1 judges that frequency dropped in predetermined value by the detection (a time when the period when it was shorter than Δτ/2 was for longer than Δτ/2) of 1st joint. Also, as for judgment circuit 22, frequency of 1st periodic signal F1 judges that frequency dropped in predetermined value by the detection (a time when the period when it was shorter than Δτ was for longer than Δτ) of 2nd joint.

In FIG. 4 (C), “2nd narrow area pulse of 2nd periodic signal F2” and “3rd narrow area pulse” are included between “4th narrow area pulse of 1st periodic signal F1” and “5th narrow area pulse” (upper bound 1st). And “8th narrow area pulse of 2nd periodic signal F2” and “9th narrow area pulse” are included between “9th narrow area pulse of 1st periodic signal F1” and “10th narrow area pulse” (upper bound 2nd).

In FIG. 4 (B), (C), the frequency which detection of upper bound 1st was made is shown with f1, 2 (the frequency of a high side), and it is shown the frequency that detection of upper bound 2nd was done with f1, 1 (the frequency of a low side). In FIG. 4 (B), it is shown a time of this time by “1st lower limit detection” and “2nd lower limit detection”.

Judgment circuit 22 detects that 8th narrow area pulse and 9th narrow area pulse of 2nd periodic signal F2 are included between 9th narrow area pulse and 10th narrow area pulse of 1st periodic signal F1. That is, that frequency of 1st periodic signal F1 changes in a predetermined level of the low level side by the detection of 2nd joint more or the place set value of the drop direction side was further reached is judged. The period when the detection of 2nd joint was shorter than Δτ is a time when it was for longer than Δτ.

Note that, in 2nd embodiment, only the detection of 1st joint is performed like 1st embodiment unless the shortest period of 1st periodic signal F1 becomes lower than half of the longest period (unless the smallest frequency of 1st periodic signal F1 is as above 2 times of maximum frequency). When a change of the frequency is small because it is it, the detection after 2nd joint by judgment circuit 22 does not have to consider. For example, the detection after 2nd joint is not done when frequency of 1st periodic signal F1 changes in the range of 26 MHz from 25 MHz.

FIG. 5 (A), (B), FIG. 6 are figures showing 3rd embodiment of “invention A”. This frequency detection apparatus 3 has a function of frequency detection apparatus 1 of FIG. 1 (A) and a function of frequency detection apparatus 2 of FIG. 3 (A). In FIG. 5 (A), frequency detection apparatus 3 possesses delayed signals output circuit 31 and judgment circuit 32.

The 1st periodic signal F1 that frequency changes at time (it gets longer dynamically or it shortens) is input, and delayed signals output circuit 31 outputs 2nd periodic signal F2 where only Δτ retarded this 1st periodic signal F1 for predetermined time.

In this embodiment, as shown in FIG. 6, the frequency of 1st periodic signal F1 is set to change dynamically. It increases to 9 Hz in a harmonic progression from frequency 1 Hz, and the frequency of 1st periodic signal F1 is set to go low in a harmonic progression from frequency 9 Hz after this.

Also, as shown in FIG. 6, 1st periodic signal F1 is a narrow width pulse string. Thus, 2nd periodic signal F2 is a narrow width pulse string, too. It is referred 1,2,3, . . . number to “a narrow width pulse string of 1st periodic signal F1” and “a narrow width pulse string of 2nd periodic signal F2” depending on progress at time to make explanation plain in FIG. 6, respectively.

When the period of “6th narrow width pulse of 1st periodic signal F1” shortens than Δτ by the process that frequency increases, it is shown (an upper bound). Also, it is shown (a lower limit) when the period of “the eleventh narrow width pulse of 1st periodic signal F1” becomes for longer than Δτ by the process when frequency decreases.

In FIG. 7 (B), (C), it is shown the frequency which the detection of the upper bound and lower limit detection were made with f1, 1. In FIG. 7 (B), it is shown a time of this time by “upper bound detection” and “lower limit detection”. FIG. 7 (A), (B), FIG. 8 are figures of a frequency detection apparatus having “a function of frequency detection apparatus 1 of FIG. 2” (A) and “a function of frequency detection apparatus 2 of FIG. 4” (A).

In FIG. 7 (A), frequency detection apparatus 3 consists of delayed signals output circuit 31 and judgment circuit 32 comprising counter 321. The frequency of 1st periodic signal F1 changes dynamically. The 1st periodic signal F1 that frequency changes at time is input, and delayed signals output circuit 31 outputs 2nd periodic signal F2 where only Δτ retarded this 1st periodic signal F1 for predetermined time.

Counter 321 inputs 1st periodic signal F1 and 2nd periodic signal F2, and a record (an increment) does the number of times that period of 1st periodic signal F1 was included in period of 2nd periodic signal F2. With this, a record (a decrement) does what included period of 2nd periodic signal F2 in period of 1st periodic signal F1.

In this embodiment, as shown in FIG. 8, the frequency of 1st periodic signal F1 is set to change dynamically. It increases to 13 Hz in a harmonic progression from frequency 1 Hz, and the frequency of 1st periodic signal F1 is set to go low in a harmonic progression from frequency 13 Hz after this. Also, as shown in FIG. 8, 1st periodic signal F1 is a narrow width pulse string, and it wants to be done, and 2nd periodic signal F2 is a narrow width pulse string, too. It is referred 1,2,3, . . . number to “a narrow width pulse string of 1st periodic signal F1” and “a narrow width pulse string of 2nd periodic signal F2” depending on progress at time to make explanation plain in FIG. 8, respectively.

In FIG. 8, as for the judgment by judgment circuit 32, frequency is performed twice twice by a decreasing process by the process that frequency increases, respectively. When the period of “6th narrow width pulse of 1st periodic signal F1” shortens than Δτ by the process that frequency increases (upper bound 1st) and when the period of “the eleventh narrow width pulse of 1st periodic signal F1” shortens more from Δτ/2, it is shown (upper bound 2nd).

When it is for longer than Δτ/2 the period of “the narrow width pulse of 1st periodic signal F1” by the process when frequency also decreases (lower limit 1st) and when it “is further for longer than Δτ “a narrow width pulse of 1st periodic signal F1” period, it is shown” (lower limit 2nd). In FIG. 7 (B), (C), the frequency which detection of upper bound 1st and detection of lower limit 2nd were made is shown with f1, 1, and it is shown the frequency that detection of upper bound 2nd and detection of lower limit 1st were done with f1, 2.

In FIG. 7 (B), it is shown a time of this time by “1st upper bound detection”, “2nd lower limit detection”, “2nd upper bound detection”, “1st lower limit detection”.

As far as, in 3rd embodiment, the shortest period of 1st periodic signal F1 does not become lower than half of the longest period like 1st embodiment (as far as maximum frequency of 1st periodic signal F1 does not become lower than half of the smallest frequency), only the detection of 1st joint is performed. Thus, the detection after 2nd joint does not have to consider when a change of the frequency is small. For example, the detection after 2nd joint by judgment circuit 22 is not done when frequency of 1st periodic signal F1 changes in the range of 25-40 MHz.

FIG. 9 is a figure of which shows the frequency detection apparatus that frequency detection apparatus 1 of FIG. 1 (A) was connected to a plural number as 1 unit, and was comprised. This frequency detection apparatus has the common 1st periodic signal. Frequency detection apparatus 4 of FIG. 9 comprises delayed signals output circuit 11 and 1st unit UA comprising judgment circuit 12 and delayed signals output circuit 11 and 2nd unit UB comprising judgment circuit 22. Also, control circuit 43 inputting these listing is connected to a subsequent stage of 1st unit UA and 2nd unit UB.

The 1st periodic signal F1 input into 1st unit UA and 2nd unit UB inputs the common 1st periodic signal F1. Also, it is different from ΔτB in delay time to 1st periodic signal F1 of 2nd periodic signal F2B in ΔτA and 2nd unit UB in delay time to 1st periodic signal F1 of 2nd periodic signal FA2 in 1st unit UA. However, it is ΔτA <ΔτB. With frequency detection apparatus 4 of FIG. 9, appropriate upper limited frequency fA1 and lower cut-off frequency frequency fB1 can be set as shown in FIG. 10.

FIG. 11 is a figure of which shows frequency detection apparatus 5 that plural units were connected in parallel as 1 unit, and comprised a frequency detecting circuit of power conversion equipment 1 of FIG. 1 (A). In FIG. 11, a preceding paragraph of 1st unit UA (frequency detecting circuit 5A) and 2nd unit UB (frequency detecting circuit 5B) is provided with distributing circuit 54 which distributes 1st periodic signal F1 between phase difference π. Distributing circuit 54 outputs two 1st periodic signal FA1, FB1 in phase difference π. As a practical matter, for example, as F1=FA1 the FB1

F1 vs. it is done, and π can be delayed.

First unit UA (frequency detecting circuit 5A) consists of delayed signals output circuit 51A and judgment circuit 52. It is not illustrated, but the delay control circuit can be provided in the preceding paragraph of delayed signals output circuit 51A. Also, 2nd unit UB (frequency detecting circuit 5B) consists of delayed signals output circuit 51B and judgment circuit 52. It is not illustrated, but it is possible to provide the delay control circuit in the preceding paragraph of delayed signals output circuit 51B.

Delay time to 1st periodic signal F1 of 2nd periodic signal FA2 in 1st unit UA (frequency detecting circuit 5A) is assumed ΔτA. Delay time to 1st periodic signal F1 of 2nd periodic signal FB2 in 2nd unit UB (frequency detecting circuit 5B) is assumed ΔτB. It is different from ΔτB in ΔτA and delay time by delay time (ΔτA <ΔτB).

First unit UA, a subsequent stage of 2nd unit UB are provided with common synthetic circuit 55. First unit UA, listing of 2nd unit UB are synthesized. As for frequency detection apparatus 5 of FIG. 11, substantial resolution doubles as shown in FIG. 13. As a practical matter, the listing such as SQ of FIG. 12 needs not to be done.

Note that, in FIG. 11, frequency detection apparatus 1 of FIG. 1 (A) was connected to a plural number as 1 unit, and it was comprised. A plural number can connect frequency detection apparatus 1, FIG. 3 (A) of FIG. 2 (A), frequency detection apparatus 2, FIG. 5 (A) of FIG. 4 (A), frequency detection apparatus 3 of FIG. 7 (A) as 1 unit. Frequency detection apparatus 1 can be comprised in combination with frequency detection apparatus 4 of FIG. 9.

FIG. 13 is a figure of which shows frequency detection apparatus 6 that plural units were connected in parallel as 1 unit, and comprised a frequency detecting circuit of power conversion equipment 1 of FIG. 1 (A). Here, each frequency detecting circuit has the common 1st periodic signal F1. This 1st periodic signal F1 is sent to 1st unit UA, either of 2nd unit UB by range selective circuit 65 whether it belongs to a low level whether frequency of 1st periodic signal F1 belongs to high pass.

In FIG. 13, 1st unit UA (frequency detecting circuit 6A) consists of delayed signals output circuit 61A and judgment circuit 62. It is not illustrated, but a preceding paragraph of delayed signals output circuit 61B may be provided with a delay control circuit. Also, 2nd unit UB (frequency detecting circuit 6B) consists of delayed signals output circuit 61B and judgment circuit 62. It is not illustrated, but a preceding paragraph of delayed signals output circuit 61B may be provided with a delay control circuit.

It may be the same as ΔτB in delay time to 1st periodic signal FB1 of ΔτA and 2nd periodic signal FB2 in delay time to 1st periodic signal FA1 of 2nd periodic signal FA2.

Also, ΔτB may be different from ΔτA in these delay time.

Frequency detection apparatus 6 of FIG. 13 can divide frequency ranges into the operating range of two units. That is, frequency detection apparatus 6 of FIG. 13 divides “frequency ranges of 1st periodic signal F1 input into range selective circuit 65” into two operating ranges (an operating range of unit UA and an operating range of unit UB) as shown in FIG. 14.

Note that, in FIG. 13, frequency detection apparatus 1 of FIG. 1 (A) was connected to a plural number as 1 unit, and it was comprised. A plural number can connect frequency detection apparatus 1, FIG. 3 (A) of FIG. 2 (A), frequency detection apparatus 2, FIG. 5 (A) of FIG. 4 (A), frequency detection apparatus 3 of FIG. 7 (A) as 1 unit. Also, a frequency detection apparatus of FIG. 13 can be combined with frequency detection apparatus four or five of FIG. 9, FIG. 11.

(Invention B): FIGS. 15 and 16 are figures showing the configuration of the electric circuit controller of “invention B”. In FIG. 15, electric circuit controller 102 has periodic signal generation circuit 103, frequency detecting circuit 104, driving signal generation circuit 105 and delay control circuit 106. Periodic signal generation circuit 103 detects the voltage which an electric information of electric circuit 101 is equivalent to, and the detection value is converted into 1st periodic signal F1. In FIG. 15, “the voltage which an electric information of electric circuit 101 is equivalent” to is one or electric information two or more (1st signal group).

Frequency detecting circuit 104 consists of delayed signals output circuit 1041 and judgment circuit 1042. Periodic signal generation circuit 103 detects 1st signal group of electric circuit 101 as voltage signal F1, and it is output to judgment circuit 1042. Δτ is set to delayed signals output circuit 1041 in delay time, and delayed signals output circuit 1041 outputs 2nd periodic signal F1 that Δτ delayed to 1st voltage signal F1 to judgment circuit 105. First periodic signal F3 and 2nd periodic signal F2 are input, and judgment circuit 105 detects whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2. Also, judgment circuit 105 detects whether period of 2nd periodic signal F2 was included in period of 1st periodic signal F1. Driving signal generation circuit 105 generates control signal VGs from this judgment circuit signal, and this is sent out to an electric switch of electric circuit 101.

In FIG. 16, a preceding paragraph of delayed signals output circuit 1041 is provided with delay control circuit 106. Delay control circuit 106 detects the voltage which an electric information of electric circuit 101 is equivalent to, and a delay control signal is generated. In FIG. 16, “the voltage which an electric information of electric circuit 101 is equivalent” to is one or electric information two or more: It is 1st signal group. In 2nd signal group, 1st signal and part may repeat. Also, the delay control signal may be the fixed number, and it may be changing signal dynamically (including signal changing every constant cycle).

In “invention B” the electric information included in electric circuit 101, for example, input current, Input voltage, Output current, Output voltage, Voltage emerging to an electric reactor, The electric reactor current flowing, Voltage emerging to the electric switch, The electric switch current flowing, It is current flowing with voltage emerging to a diode (a commutation diode, a rectifier diode), the diode

. These voltage and current can be adopted as electrical signal in FIGS. 15 and 16.

FIG. 17 is a figure showing power conversion equipment 1, and 1st embodiment that applied electric circuit controller 102 of FIG. 16 to the control of power converters is shown. Note that electric circuit controller 102 of FIG. 15 can be applied to control of the power conversion equipment (cf. FIG. 16 to be described below). Power conversion equipment 1 includes power converters 11 and control circuit 12 in FIG. 17. In 1st embodiment, power converters 11 is voltage-controlled DC/DC transducer, and DC/DC converts DC voltage of power supply 81, and it is supplied to load 82.

Control circuit 12 has periodic signal generation circuit 13 and frequency detecting circuit 14 and driving signal generation circuit 15 and delay control circuit 16. Periodic signal generation circuit 13 detects voltage Vi corresponding to circuit current i of power converters 11, and a detection level is converted into periodic signal F1. Periodic signal generation circuit 13 can be comprised, for example, from an analog voltage controlled oscillator (VCO).

Frequency detecting circuit 14 consists of delayed signals generation circuit 141 and judgment circuit 142. Delay control circuit 16 detects output voltage eO of power converters 11 through analog-to-digital converter 17, and delayed signals generation circuit 141 can output delay control sincerity DLY (eO). When delayed signals generation circuit 141 works by analog input, analog-to-digital converter 17 is unnecessary in FIG. 17.

Delayed signals generation circuit 141 outputs 2nd periodic signal F2 where only Δτ retarded 1st periodic signal F1 for predetermined time. The predetermined time Δ tau (it is time depending on DLY (eO) and, as for this time, is smaller than initial period of 1st periodic signal F1.) Judgment circuit 142 inputs 1st periodic signal F1 and 2nd periodic signal F2, and it is detected whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2, and judgment signal is output. Also, judgment circuit 142 detects whether period of 2nd periodic signal F2 was included in period of 1st periodic signal F1, and judgment signal is output.

As for driving signal generation circuit 15, the control terminal of an electric switch comprising power converters 11 can output control signal VGs. The electric circuit controller of “invention B” can apply to three-phase power converter 11 as shown in FIG. 18. Three phase voltage va, vb, vc are input into power conversion equipment 1 in FIG. 18. a aspect controller 12 a, b aspect controller 12 b, c aspect controller 12 c take electric information group A, electric information group B, electric information group C from power converters 11.

Based on these electric information group, a control signal is output to the electric switch of each aspect to comprise power conversion equipment 1.

FIG. 19 is an figure shown in the elaboration with power conversion equipment 1 of FIG. 17 more. Power conversion equipment 1 includes power converters 11 and control circuit 12 in FIG. 19. In 1st embodiment, power converters 11 is current control type DC/DC transducer, and DC/DC converts DC voltage of power supply 81, and it is supplied to load 82.

As for power converters 11, it is electric switch 111 and electric reactor 112 from current detecting resistance 113 and commutation diode 114 and capacitor 115.

Electric switch 11 and electric reactor 112 and current detecting resistance 113 are performed series connection of sequentially by the input side, and commutation diode 114 is connected to a T-head character between electric switch 11 and electric reactor 112, and capacitor 115 is connected to an output side.

Control circuit 12 is the same as electric circuit controller 12 shown in FIG. 17. That is, periodic signal generation circuit 13 inputs current detecting both ends voltage v1 of resistance 113, v2, and voltage drop VR=(v1-v2) is detected. Here, (v1-v2) is the value that converted electric reactor current iL (a circuit current in “invention B”) into voltage. And periodic signal generation circuit 13 converts a detection level into periodic signal f1, and it is output as 1st periodic signal F1. As for frequency detecting circuit 14, delayed signals generation circuit 141 outputs 2nd periodic signal F2 where only Δτ retarded 1st periodic signal F1 for predetermined time from delayed signals generation circuit 141 and judgment circuit 142. Also, judgment circuit 142 inputs 1st periodic signal F1 and 2nd periodic signal F2, and it is detected whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2, and judgment signal is output.

As shown in STs of FIG. 20 (A), driving signal generation circuit 15 works in clock STs of Ts in period, and control signal VGs to send out to electric switch 111 in height of the rise of clock STs is turned on. On the other hand, delayed signals generation circuit 141 inputs voltage VR (v1-v2) as shown in V=R/iL of FIG. 20 (A), and this is converted into periodic signal f1 (cf. frequency characteristic of the half pace of FIG. 20 (A)). In FIG. 20 (A), 40 MHz includes the frequency in approximately 30 MHz, an upper bound with a lower limit.

That is, judgment circuit 141 outputs judgment signal SQ when frequency f1 of 1st periodic signal F1 reached predetermined threshold fSH (approximately 40 MHz). Here, when Δτ was reached in the period when period of 1st periodic signal F1 supported when “predetermined threshold fSH (approximately 40 MHz) was reached” (it is FIG. 20 (B).) However, the threshold of the figure can give a degree of leaning to keep the stability of the stem to be usually conducted with electric power converters of this method. When judgment signal SQ is output, driving signal generation circuit 15 outputs the control signal that an electric switch becomes the OFF to power converters 11.

In FIG. 20 (A), periodic signal generation circuit 13 of FIG. 19 inputs both ends voltage of current detecting resistance 114 (ohmic value R1), and voltage drop V1=R1/iS is detected. Also, in FIG. 20 (B), periodic signal generation circuit 13 of FIG. 19 detects value of voltage drop V=R/iS and value of value (ohmic value R2) voltage drop V2=R2/iD of the both ends voltage of commutation diode 114. And periodic signal generation circuit 13 produces 1st periodic signal F1 of the adding up level equivalent value of the current.

Electric reactor current iL is adopted as a circuit current of FIG. 17 in FIG. 19, but, as shown in FIG. 21, electric switch 211 can be assumed current flowing iS by a circuit current. A change state is shown in FIG. 22 (A) at the time in all parts of the power conversion equipment, and a change state is shown in (B) at 1st periodic signal F1, time of 2nd periodic signal F2. When commutation diode 114 is off, in the power conversion equipment of FIG. 21, iS becomes the bottom value as shown in FIG. 22 (A) (it refers to the wave form chart showing the characteristic of frequency f and a wave form chart showing voltage V=R1 X is). However, the listing of the electric circuit controller is the same as listing of electric circuit controller 12 of FIG. 19 (clock STs of FIG. 22, judgment signal SQ, cf. control signal VGs).

FIG. 23 is a figure of which shows power conversion equipment 1 which these two units (frequency detecting circuit 14A, 14B) were connected in parallel as 1 unit, and comprised frequency detecting circuit 14 of power conversion equipment 1 of FIG. 19. Frequency detecting circuit 14A, the configuration of 14B are the same, and, in FIG. 23, delay control circuit 16A, 16B send out signal to control Δτ which is common to delayed signals generation circuit 141, respectively. The delay time A tau to be set to

, each delayed signals generation circuit 141 is the same. In FIG. 23, delay control circuit 16A, 16B are established in frequency detecting circuit 14A, 14B, respectively. However, listing of delay control circuit 16A may be sent out to delayed signals generation circuit 141 of frequency detecting circuit 14A and delayed signals generation circuit 141 of frequency detecting circuit 14B without, for example, establishing delay control 16B.

Control circuit 12 of FIG. 23 is provided with phase shift circuit 27. Phase shift circuit 27 is connected to periodic signal generation circuit 13B of periodic signal generation circuit 13A of 1st unit (frequency detecting circuit 24A) and 2nd unit (frequency detecting circuit 24B). Phase shift circuit 27 works to be able to give each 1st periodic signal F1 which periodic signal generation circuit 13A, 13B produce phase difference π.

As shown in FIG. 24, a phase difference is π with 1st periodic signal F1 which 1st periodic signal F1 which periodic signal generation circuit 13A outputs and periodic signal generation circuit 13B output. Thus, detection resolution (judgment accuracy) doubles.

Note that electric reactor current iL of FIG. 19 power converters 11 cannot be measured. That is, as shown in FIG. 25, it is possible so that periodic signal generation circuit 13 acquires current flowing with current flowing and commutation diode 114 with electric switch 111.

In FIG. 26, frequency detecting circuit 14 of power conversion equipment 1 of FIG. 19 is assumed 1 unit, and these two units are connected in parallel, and power conversion equipment 1 is comprised. In FIG. 26, two units are frequency detecting circuit 14A, 14B.

Control circuit 12 of power conversion equipment 1 is provided with range selective circuit 18. Each frequency detecting circuit 14A, 14B have the common 1st periodic signal F1. This 1st periodic signal F1 is sent to 1st unit, either of 2nd unit (frequency detecting circuit 14A, 14B) whether it belongs to a low level whether frequency of 1st periodic signal F1 belongs to high pass.

In FIG. 26, 1st unit (frequency detecting circuit 14A) consists of delayed signals generation circuit 141 and judgment circuit 142. A preceding paragraph of delayed signals generation circuit 141 may be provided with delay control circuit 16A. Also, 2nd unit (frequency detecting circuit 14B) consists of delayed signals generation circuit 141 and judgment circuit 142. A preceding paragraph of delayed signals generation circuit 141 is provided with delay control circuit 16B.

ΔτB may be the same in delay time to 1st periodic signal FB1 of ΔτA and 2nd periodic signal FB2 in 2nd unit (frequency detecting circuit 14B) in delay time to 1st periodic signal FA1 of 2nd periodic signal FA2 in 1st unit (frequency detecting circuit 14A). Also, it may be different.

Converter 1 of FIG. 26 can divide (i.e., depending on the dimension of circuit current magnitude namely the load), frequency processing in two to 1st unit (frequency detecting circuit 24A) or a 2nd unit (frequency detecting circuit 24B) depending on dimension of voltage input into range selective circuit 18 as shown in FIG. 27. Thus, the operating range can be enlarged substantially, too.

Power conversion equipment 1 of FIG. 28 operates a circuit current between an upper bound and an upper bound (i.e., 1st periodic signal F1 is operated between the upper bound threshold and the lower limit threshold). In FIG. 28, power conversion equipment 1 which (frequency detecting circuit 14A, 14B) is connected in parallel, and comprised these two units is comprised as 1 unit with frequency detecting circuit 14 of power conversion equipment 1 of FIG. 19.

Here, periodic signal generation circuit 13 outputs frequency detecting circuit 14A and 1st periodic signal F1 which are common to frequency detecting circuit 14B. The 1st unit (frequency detecting circuit 14A) consists of delayed signals generation circuit 141 and judgment circuit 142. A preceding paragraph of delayed signals generation circuit 141 is provided with delay control circuit 16A. The 2nd unit (frequency detecting circuit 14B) consists of delayed signals generation circuit 141 and judgment circuit 142. A preceding paragraph of delayed signals generation circuit 141 is provided with delay control circuit 16B.

In FIG. 28, it is different from ΔτB as shown in FIG. 29 (A), (B), (C) in ΔτA and delay time in delay time to 1st periodic signal F1 (ΔτA<ΔτB). It is different from ΔτB in delay time to 1st periodic signal F1 of ΔτA and 2nd periodic signal FB2 in 2nd unit (frequency detecting circuit 24B) in delay time to 1st periodic signal F1 of 2nd periodic signal FA2 in 1st unit (frequency detecting circuit 14A) (ΔτA<ΔτB). With power conversion equipment 1 of FIG. 28, upper limited frequency fSHA and lower cut-off frequency fSHB become the threshold, and frequency of 1st periodic signal F1 is controlled (i.e., electric reactor current iL is controlled).

The signal state of all parts of power conversion equipment 1 is shown, and a state 1st periodic signal F1 and 2nd periodic signal FA2 are proportional to FIG. 29 (B) at time, and to fluctuate is shown in FIG. 29 (A) with a pulse string. A state 1st periodic signal F1 and 2nd periodic signal FB2 are proportional to FIG. 29 (C) at time, and to fluctuate is shown with a pulse string. It is different from ΔτB in delay time to 1st periodic signal F1 of 2nd periodic signal F2 in ΔτA and frequency detecting circuit 14B in delay time to 1st periodic signal FA1 of 2nd periodic signal FA2 in frequency detecting circuit 14A, and it is ΔτB>ΔτA. When period shrank than ΔτA when period is smaller greatly from ΔτA than ΔτB, as for driving signal generation circuit 15, an electric switch outputs OFF and the control signal that it is to power converters 11. When when “period is smaller greatly from ΔτA than ΔτB”, frequency factory automation corresponding to ΔτA is higher than frequency fB corresponding to ΔτB.

When “period shrank than ΔτA”, it is time beyond the frequency factory automation corresponding to ΔτA.

And, as for (when it fell from frequency fB), driving signal generation circuit 15 outputs the control signal that an electric switch becomes the ON to power conversion 11 when period grew big than ΔτB (cf. VGs of FIG. 29 (A)). Judgment circuit 142 detects with power conversion equipment 1 of FIG. 28 whether one period of 1st periodic signal FA1 included one period of 2nd periodic signal FA2, and judgment circuit 142 detects whether one period of 2nd periodic signal FA2 included one period of 1st periodic signal FB1. When driving signal generation circuit 15 controls PID control, the FIR control IIR control, delayed signals generation circuit 141 of delay control circuit 16A, a delay characteristic of delayed signals generation circuit 141 of delay control circuit 16B can be changed.

For example, delay control circuit 16A, 16B change ΔτA, ΔτB so that listing of control circuit 12 has a characteristic of the A (eO-Er)-EB. ΔτA, ΔτB are set to delay control circuit 16A, each delayed signals generation circuit 141 of 16B. In A, in transmission coefficient, eO, as for the output voltage of power converters 11, the Er, reference voltage, Er are bias voltage. By the change of this delay characteristic, the frequency threshold when it changes changes, for example, into the side that is smaller than ΔτA as shown in a figure of of circuit current i of FIG. 29 (B) frequency change, a figure of narrow width pulse of FIG. 29 (B) from the side where period of 1st periodic signal F1 is bigger than ΔτA. Also, as shown in a figure of of circuit current i of FIG. 29 (B) frequency change, a figure of narrow width pulse of FIG. 29 (C), the frequency threshold when it changes changes into the side that is bigger than ΔτB from the side where period of 1st periodic signal F1 is smaller than ΔτB.

Circuit current i of FIG. 29 (B) is 1st periodic signal F1.

“The frequency threshold when period of 1st periodic signal F1 changes in the side that is smaller than ΔτA from the side that is bigger than ΔτA” is upper bound threshold fASH of the figure of frequency change of FIG. 29 (B).

Circuit current i of FIG. 29 (B) is 1st periodic signal F1.

“The frequency threshold when period of 1st periodic signal F1 changes in the side that is bigger than ΔτB from the side that is smaller than ΔτB” is lower limit threshold fBSH of the figure of frequency change of FIG. 29 (C).

That is, with power conversion equipment 1 of FIG. 28, that period of 1st periodic signal F1 having changed in the side that is smaller than ΔτA from the side that is bigger than ΔτA, period of 1st periodic signal F1 changed in the side that is bigger than ΔτB from the side that is smaller than ΔτB is detected as shown in FIG. 29 (A), (B), (C). It is the same as “frequency f1 of 1st periodic signal F1 having reached the upper limit of the predetermined characteristic” that “period of 1st periodic signal F1 changed in the side that is smaller than ΔτA from the side that is bigger than ΔτA”. As for “period of 1st periodic signal F1 having changed in the side that is bigger than ΔτB from the side that is smaller than ΔτB”, it is the same that “frequency f1 of 1st periodic signal F1 reached the lower limit of the predetermined characteristic”.

When frequency f1 of 1st periodic signal F1 reached upper bound threshold fASH, as for driving signal generation circuit 15, an electric switch outputs OFF and the control signal that it is to power converters 11. When frequency f1 of 1st periodic signal F1 fell to lower limit threshold fBSH, the control signal that an electric switch becomes the ON to power converters 11 is output (cf. VGs of FIG. 29 (A)).

FIG. 30 is an figure showing 2nd embodiment of the power conversion equipment of “invention B”. Power conversion equipment 2 includes power converters 21 and control circuit 22 in FIG. 30. In 2nd embodiment, power converters 21 is voltage-controlled DC/DC transducer, and DC/DC converts DC voltage of power supply 81, and it is supplied to load 82.

Control circuit 22 has periodic signal generation circuit 23 and frequency detecting circuit 24 and driving signal generation circuit 25. Periodic signal generation circuit 23 detects output voltage eO of power converters 21, and a detection level is converted into periodic signal F1.

Frequency detecting circuit 24 consists of delayed signals generation circuit 241 and judgment circuit 242. Delayed signals generation circuit 241 outputs 2nd periodic signal F2 where only Δτ (smaller than initial period of 1st periodic signal F1) retarded 1st periodic signal F1 for predetermined time. Judgment circuit 242 inputs 1st periodic signal F1 and 2nd periodic signal F2, and it is detected whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2, and judgment signal is output. Also, judgment circuit 242 detects whether period of 2nd periodic signal F2 was included in period of st periodic signal F1, and judgment signal is output. As for driving signal generation circuit 25, the control terminal of an electric switch comprising power converters 21 can output a control signal.

FIG. 31 (A), (B), (C) are operation figures of frequency detecting circuit 2 of FIG. 30. FIG. 31 (A) is a figure showing the changes oft at time of output voltage eO of power converters 21 (among the figures above with a command of output voltage eO as shown in eO *). FIG. 31 (B) is a figure showing output frequency (frequency corresponding to output voltage eO) f of periodic signal generation circuit 23. It is the figure as shown in the pulse string with a state 1st periodic signal F1 is proportional to FIG. 31 (C) at time, and to fluctuate. It is referred 1,2,3, . . . number to a narrow width pulse string of 1st periodic signal F1 and 2nd periodic signal F2 depending on progress at time to make explanation plain in FIG. 31 (C), respectively.

Also, 1st periodic signal F1 is set as follows period decreases in a harmonic progression from frequency 1 Hz, and to increase.

-   -   The interval between the narrow width pulses of 1st and 2nd:     -   The interval between the narrow width pulses of 1.2 2nds joint         and 3rd:     -   The interval between the narrow width pulses of half 2nd 3rd and         4th:     -   The interval between the narrow width pulses of one-3rd 2nd 4th         and 5th:     -   The interval between the narrow width pulses of quarter 2nd 5th         and 6th:     -   The interval between the narrow width pulses of ⅕ 2nd 6th and         7th:     -   The interval between the narrow width pulses of ⅙ 2nd 7th and         8th:     -   The interval between the narrow width pulses of 1/7 2nd 8th and         9th:     -   The interval between the narrow width pulses of ⅙ 2nd 9th and         10th:     -   The interval between the narrow width pulses of ⅕ 2nd 10th and         the eleventh:     -   The interval between the narrow width pulses of quarter 2nd the         eleventh and the twelfth: A one-3rd 2nd

It is equivalent with including period of 1st periodic signal F1 in period of 2nd periodic signal F2 and two narrow width pulses to continue of 1st periodic signal F1 being located between two narrow width pulses to continue of 2nd periodic signal F2. Also, it is equivalent with including period of 2nd periodic signal F1 in period of 1st periodic signal F1 and two narrow width pulses to continue of 2nd periodic signal F2 being located between two narrow width pulses to continue of 1st periodic signal F1. In a judgment whether or not period of 1st periodic signal F1 was included in period of 2nd periodic signal F2, a former narrow width pulse may be piled up in the former narrow width pulse among two narrow width pulses to continue of 2nd periodic signal F2 among two narrow width pulses to continue of 1st periodic signal F1. Also, a later narrow width pulse may be piled up in the later narrow width pulse among two narrow width pulses to continue of 2nd periodic signal F2 among two consecutive narrow width pulses of 1st periodic signal F1.

In a judgment whether or not period of 2nd periodic signal F2 was included in period of 1st periodic signal F1, a former narrow width pulse may be piled up in the former narrow width pulse among two narrow width pulses to continue of 1st periodic signal F1 among two narrow width pulses to continue of 2nd periodic signal F2. Also, a later narrow width pulse may be piled up in the later narrow width pulse among two narrow width pulses to continue of 1st periodic signal F1 among two consecutive narrow width pulses of 2nd periodic signal F2.

In this embodiment, it can be detected whether a narrow width pulse of 1st periodic signal F1 and a narrow width pulse of 2nd periodic signal F2 are detected alternately whether period of 1st periodic signal F1 was included in period of 2nd periodic signal F2. Also, it can be detected whether period of 2nd periodic signal F2 was included in period of 1st periodic signal F1.

That is, in FIG. 31 (C), judgment circuit 242 detects signal of signal of the periodic signal F1 and periodic signal F2 in alternating characteristics. In 2nd embodiment, frequency f1 of 1st periodic signal F1 is proportional at time, and it becomes higher or it goes low. It shortens in a harmonic progression according to progress at time in period of 1st periodic signal F1 or, as shown in FIG. 31 (C), it thereby gets longer.

In this case, judgment circuit 242 is judged to have an alternating characteristics to the next narrow width pulse.

-   -   “The 1st narrow width pulse of 1st periodic signal F1,”     -   “The 1st narrow width pulse of 2nd periodic signal F2,”     -   “The 2nd narrow width pulse of 1st periodic signal F1,”     -   “The 5th narrow width pulse of 2nd periodic signal F2,”     -   “6th narrow width pulse of 1st periodic signal F1,”         However, after “6th narrow width pulse of 1st periodic signal         F1”, “7th narrow width pulse of 1st periodic signal F1” is         detected. Thus, judgment circuit 242 judges alternating         characteristics that there is not at this time (“upper bound”         reference of FIG. 31 (C)).

That is, when, in 1st time when alternating characteristics with a narrow width pulse of 1st periodic signal F1 and the narrow width pulse of 2nd periodic signal F2 disappeared, 7th narrow width pulse of 1st periodic signal F1 was input into judgment circuit 242 in FIG. 31 (C). Judgment circuit 242 may detect a time when (the period when it is bigger than Δτ) shrank than Δτ in period of 1st periodic signal F1. “A time when it shrank than Δτ” is a time when a narrow width pulse of 6th to 7th of 1st periodic signal F1 was input.

Note that there is “7th narrow width pulse of 1st periodic signal F1” by all means than “6th narrow width pulse of 2nd periodic signal F2” to the left because the spacing of “6th narrow width pulse of 1st periodic signal F1” and “7th narrow width pulse” is smaller than Δτ and the spacing of “6th narrow width pulse of 1st periodic signal F1” and “6th narrow width pulse of 2nd periodic signal F2” is Δτ. From this, that judgment circuit 242 can detect a time when period of 1st periodic signal F1 shrank than Δτ is understood.

Then, when, in 2nd time when alternating characteristics with a narrow width pulse of 1st periodic signal F1 and the narrow width pulse of 2nd periodic signal F2 disappeared, 9th narrow width pulse of 2nd periodic signal F2 was input into judgment circuit 242 in FIG. 31 (C). Judgment circuit 242 judges alternating characteristics that there is not at this time (“lower limit” reference of FIG. 31 (C)). Judgment circuit 242 can detect a time when (the period when it is smaller than Δτ) grew big than A r in period of 1st periodic signal F1 in this way. “A time when it grew big than Δτ” is a time when 8th narrow width pulse of 1st periodic signal F1 was input.

In other words, in FIG. 31 (C), 6th narrow width pulse of 2nd periodic signal F2 is late for time of Δτ to 6th narrow width pulse of 1st periodic signal F1. It thereby resembles 9th narrow width pulse of 1st periodic signal F1 to include 8th narrow width pulse of 2nd periodic signal F2 and 9th narrow width pulse between 10th narrow width pulse. Thus, judgment circuit 142 may detect (a time when narrow area pulse of 9th to 10th of 1st periodic signal F1 was input) in a time when period of 2nd periodic signal F2 grew big than Δτ.

As mentioned earlier, in 2nd embodiment, frequency (frequency of, thus, 2nd periodic signal F2) of 1st periodic signal F1 rises in a harmonic progression. In this embodiment, frequency of 1st periodic signal F1 described a case to fluctuate like 1 Hz, 2 Hz, . . . , 5 Hz, 6 Hz, 7 Hz, . . . , 6 Hz, 5 Hz, . . . to make plain (cf. FIG. 31 (C)). As a practical matter, the frequency of 1st periodic signal F1 is made, for example, to fluctuate to the vicinities of 25*106 Hz-50*106 Hz.

As described earlier, frequency detecting circuit 24 can detect a time when it grew big than Δτ in a time when a narrow width pulse interval of 1st periodic signal F1 shrank than Δτ because Δτ delays 2nd periodic signal F2 to 1st periodic signal F1.

When period of 1st periodic signal F1 is longer than Δτ, as for driving signal generation circuit 25, as for (when value of voltage eO is small), in drive signal generator 15, an electric switch outputs a control signal becoming the ON to power converters 21 (cf. VGs of FIG. 31 (B)). When period of 1st periodic signal F1 changed in the side that is smaller than Δτ from the side that is bigger than Δτ, as for driving signal generation circuit 25, an electric switch outputs OFF and the control signal that it is to power converters 21. When when period of 1st periodic signal F1 reached Δτ from the side that was bigger than Δτ when “period of 1st periodic signal F1 changed in the side that was smaller than Δτ from the side that was bigger than Δτ”, in other words, eO increased.

FIG. 32 is a figure showing power conversion equipment 2 comprising 2 units with frequency detecting circuit 24 of FIG. 30. It is done, and it is made a common use of with 1st periodic signal F1, and, in power conversion equipment 2 of FIG. 32, it is connected 1st unit (frequency detecting circuit 24A) and a 2nd unit (frequency detecting circuit 4B) to 2 units (as shown in frequency detecting circuit 24A, 24B) with a frequency detecting circuit shown in FIG. 28 in parallel. Frequency detecting circuit 24A and a subsequent stage with frequency detecting circuit 24B are provided with driving signal generation circuit 25. Note that ΔτA is set to delayed signals generation circuit 241 of frequency detecting circuit 24A, and ΔτB is set to delayed signals generation circuit 241 of frequency detecting circuit 24B.

FIG. 33 (A) shows a change at time of output voltage eO of power conversion equipment 2. Among the figures above, it is j as shown in eO * with a command of output voltage eO. FIG. 33 (B) shows processing by judgment circuit 242. A state 1st periodic signal F1 and 2nd periodic signal FA2 are proportional to FIG. 33 (C) at time, and to fluctuate is shown with a pulse string. A state 1st periodic signal F1 and 2nd periodic signal FB2 are proportional to FIG. 33 (D) at time, and to fluctuate is shown with a pulse string.

It is different from ΔτB in delay time to 1st periodic signal F1 of 2nd periodic signal F2 in ΔτA and frequency detecting circuit 24B in delay time to 1st periodic signal FA1 of 2nd periodic signal FA2 in frequency detecting circuit 24A. That is, it is ΔτB>ΔτA. When period shrank than ΔτA when period is smaller greatly from ΔτA than ΔτB, as for driving signal generation circuit 25, as for driving signal generation circuit 25, an electric switch outputs OFF and the control signal that it is to power converters 21. When when “period is smaller greatly from ΔτA than ΔτB”, frequency factory automation corresponding to ΔτA is higher than frequency fB corresponding to ΔτB. When “period shrinks than ΔτA”, it is time beyond the frequency factory automation corresponding to ΔτA. And, as for (when it fell from frequency fB), driving signal generation circuit 25 outputs the control signal that an electric switch becomes the ON to power converters 21 when period grew big than ΔτB (cf. VGs of FIG. 33 (B)).

Judgment circuit 242A detects with power conversion equipment 2 of FIG. 32 as shown in FIG. 33 (C), (D) whether one period of 1st periodic signal FA1 included one period of 2nd periodic signal FA2. And judgment circuit 242B detects whether one period of 1st periodic signal FB1 was included in one period of 2nd periodic signal FA2.

When frequency f1 of 1st periodic signal F1 reached upper bound threshold fASH, as for driving signal generation circuit 25, an electric switch outputs OFF and the control signal that it is to power converters 21. And, as for driving signal generation circuit 25, an electric switch outputs OFF and the control signal that it is to power converters 21 when frequency f1 of 1st periodic signal F1 fell to lower limit threshold fBSH (cf. VGs of FIG. 33 (B)).

(Invention C) : FIG. 35 is an figure showing the embodiments of a delay circuit of “invention C” and the delay circuit system. In FIG. 35, delay circuit 1 consists of detecting circuit 11 and impedance circuit 11 and control circuit 13 and input buffer 14.

In impedance circuit 12, one end is connected to input signal path 15, and other end is connected to grand G Impedance circuit 12 includes a plurality of electric switches (SW1-SWM) to change the overall impedance of the impedance circuit into when an on control signal or an off control signal was input, respectively. In impedance circuit 12, impedance components (a resistance element, a capacitative element, reactive element at least one or combinations thereof) are usually provided other than electric switch SW1-SWM. All impedance in impedance circuit 12 was able to include the impedance that electric switch SW1-SWM had, impedance of the electric wiring, but when delay to be described below only in the impedance that electric switch SW1-SWM has, impedance of the electric wiring can be formed, impedance circuit 12 does not need to have an impedance component.

It should be the configuration that can detect the threshold, and detecting circuit 11 can compare the both ends voltage of a resistance element formed on thing voltage at the end of input signal path 15 is spread, and to compare with the value, input signal path 15 with the threshold. Also, the voltage drop to occur because of a resistance ingredient included in input signal path 15 in itself can be compared with the threshold.

Input buffer 14 is connected to the beginning edge of input signal path 15 in FIG. 35. When output impedance (in FIG. 35 as shown in Z0) of input buffer 14 cannot be ignored, impedance circuit 12 considers Z0, and an impedance value is set substantially. Note that it is shown a power supply included in input buffer 14 in ge.

FIG. 36 is a graph which shows a time change of voltage VD occurring to detecting circuit 11. When voltage VD lays detecting circuit 11, and value VSH was reached, delayed signals SD is output. Threshold VSH is set to detecting circuit 11 appropriately. In FIG. 35, threshold VSH is set from controller 13. This controller 13 can be used, for example, as a controller of the power conversion equipment (cf. FIGS. 43 and 44 to be described below).

Control circuit 13 can change (delay time signal DS) in the delay time when detecting circuit 11 generates detecting circuit 11 by this which can change impedance of detecting circuit 11 by the combination of an ON state of the electric switch SW1-SM or the off state. In FIG. 35, it is shown a control signal of electric switch SW1-SWM in S1-SM.

FIG. 37 is an figure showing the other embodiments of a delay circuit of “invention C” and the delay circuit system. In FIG. 37, delay circuit 1 consists of impedance circuit 12 and detecting circuit 11 and control circuit 13 and input buffer 14. Impedance circuit 12 is comprised of 12 (1) a plurality of impedance element—12 (N). Detecting circuit 11 is connected to the termination of input signal path 15, and group S of 12 (k) impedance circuit element (k=1,2,3, . . . , N) is connected on input signal path 15. As for each impedance circuit element 12 (k), one end is connected to input signal path 15, and other end is connected to grand G

In this embodiment, each impedance circuit element 12 (k) includes electric switch SW (k), respectively. When on control signal SON was input, this electric switch electric switch SW (k) forms open position between input signal path 15 and gland G and impedance Z (k) (or admittance lateral (k)=1/Z (k)) is formed between input signal path 15 and gland G when off control signal SOFF was input.

Electric switch SW (k) is a transistor, and, in FIG. 37, impedance Z (k) includes element resistance r (k), element capacity C (k) and floating impedance Zf (floating resistance radio frequency, floating capacitance Cf and floating inductance Lf), respectively.

In this embodiment, the untied impedance of the ON is ZallON, and all electric switches of detecting circuit 11 are represented by an ON-OFF combination of electric switch SW (k). 1/Z_(allONt)=Σ(a(k)/(Z (k))

However, (k) is the coefficient that becomes to “1” at the time of “0”, off when an electric switch is on.) Σ is the totals from 1 to N. Note that all admittance Y_(ZallON) is represented in Y_(ZallON)=Σa (k) lateral (k) when it is represented in an admittance.

FIG. 38 is an embodiment which shows the delay circuit system using delay circuit to do disintegration spacing of the delay time equally and this. In this embodiment, as for delay circuit 1, impedance possesses Z (1), Z (2), . . . , impedance circuit elements of Z (N) one, respectively, (when a circuit number of element was assumed P P=N), in delay time by each impedance circuit element Tk (k=1,2, . . . , N) unit delay time as τ zero

T1 (Z (1))=τ₀

T2 (Z (2))=2²τ₀

T3 (Z (3))=2³τ0 . . .

Tk (Z (k))=2^(k−1)τ0 . . .

TN (Z (N))=2^(N−1)τ0

It is thereby possible for detecting circuit 13 to make spacing of the listing (delay time) equal spacing (with disintegration spacing of the delay time as equality).

FIG. 39 is an figure of the delay circuit system using delay circuit 1 which replaced 12 (k) impedance circuit element (k=1,2,3, . . . , N) of FIG. 37 with buffering B (k) (k=1,2,3, . . . , N) and this. In FIG. 39, it is made input impedance Z (k)=20r of the buffering Bk the same as FIG. 38.

FIG. 40 is an figure of the delay circuit system using delay circuit 1 that 12 (k) impedance circuit element (k=1,2,3, . . . , N) is 3rd state buffer TBk and this. In FIG. 40, input port of 3rd state buffer TBk is connected to input signal path 15, and control signal S (an on control signal or an off control signal) is input into a control terminal of 3rd state buffer TBk. As for the listing, it is with high impedance without control signal S depending on state of things of the input at the time of (S=0) at the time of OFF in 3rd state buffer TBk, and input just appears for the listing at the time of (S=1) at the time of ON control signal S.

In FIG. 40, resistive elements shown in impedance and FIG. 38 shown in FIG. 37 are not connected, but such impedance and resistive elements can be connected to a preceding paragraph of 3rd state buffer TBk.

FIG. 41 is an figure which shows an electric wiring form of delay circuit 1 shown in FIG. 38. In FIG. 41, lease Tate buffer TBk (k=1,2,3, . . . , N) is placed in the concentric diameter orientation. A circuit design becomes thereby easy because the electric wiring except the control signal line equals with each impedance circuit element 12.

FIG. 42 is an figure which shows application of delay circuit 1. In FIG. 42, input clocks are increased to 4 times by three delay circuit unit UA, UB, UC. In this embodiment, configuration is the same as impedance circuit element 12A of unit UA and impedance circuit element 12C of impedance circuit element 12B of unit UA and unit UA. Unit A is provided with control circuit 13, but unit B and unit C are not provided with the control circuit, and, with impedance circuit element 12B and impedance circuit element 12C, is controlled by control circuit 13 of unit UA. Because late delay is produced by one period of quarter of input signal SO in unit UA, unit UB, unit UC, as for delay circuit 1 of FIG. 42, control circuit 13 works as substantial clock 4 times circuit.

FIG. 43 is an figure showing the embodiments that applied a delay circuit of “invention C” and a delay circuit system to power conversion equipment 2. FIG. 43 uses clock 4 times circuit of FIG. 42 to the clock of the control signal. In FIG. 43, it is from power converters 21 which power conversion equipment 2 inputs electric power from direct current power supply 31, and supply electric power to load 32 and controller 22. As for controller 22, it is from signal generator 222 and reference clock generator circuit 223 and pulse compound circuit 224 and delay circuit 1 of FIG. 42 in control circuit 221 and period. Control circuit 221 converts voltage corresponding to output voltage eo from signal generator 222 into a periodic signal in period, and PWM control can be performed by well-known technique.

With power conversion equipment 2 of FIG. 43, in reference pulse SO which reference clock generator circuit 223 produces, a phase is converted into three different pulse SDA, SDB, SDC by 90. by unit A, unit B, unit C. These pulses are sent out to signal generator (V-F translate circuit) 222 by pulse compound circuit 224 in control circuit 221 and period. Thus, the available clock of signal generator 222 can do reference clock generator circuit 223 with 4 times of the pulse to occur in control circuit 221 and period.

It is the figure showing the embodiment that FIG. 44 wears a delay circuit of FIG. 42 of “invention C”, and applied a delay circuit system to power conversion equipment 4. In FIG. 44, it is from power converters 41 which power conversion equipment 4 inputs electric power from direct current power supply 31, and supply electric power to load 32 and controller 42. Controller 42 possesses control circuit 421 and periodic signal generation circuit 422, and controller 42 has driving signal generation circuit 423 and frequency detecting circuit 424. Also, frequency detecting circuit 424 comprises delay circuit 1 described in FIG. 41 from judgment circuit 425 and FIGS. 35 and 37. Periodic signal generation circuit 422 detects current flowing (circuit current equivalency voltage Vi) with output voltage eO of electric power strange replacement device 41 and the electric reactor which is not illustrated or a control switch, and the detection value is converted into 1st periodic signal F1.

Frequency detecting circuit 424 consists of delay circuit 1 and judgment circuit 425. Periodic signal generation circuit 423 detects output voltage eO and circuit current equivalency voltage Vi as voltage signal F1, and it is output to judgment circuit 425. Delay control turn (from FIG. 35, FIG. 36 a control circuit in FIG. 41) of delay circuit 1 13 sets Δτ in impedance circuit 12 in delay time, and, as for delay circuit 1, Δτ outputs 2nd periodic signal F2 which delayed to judgment circuit 425 to 1st voltage signal F1. Judgment circuit 425 detects whether 1st periodic signal F1 and 2nd periodic signal F2 are input, and period of 1st periodic signal F1 was included in period of 2nd periodic signal F1 and/or whether period of 2nd periodic signal F2 was included in period of 1st periodic signal F1, and judgment signal is output. Driving signal generation circuit 423 generates control signal VGs from this judgment circuit signal, and this is sent out to the electric switch which is not illustrated included in power inverter circuit 21.

In FIG. 44, output voltage voltage and circuit current equivalency voltage Vi of power converters 21 are detected in a control circuit, and a delay control signal is generated. 

1-42. (canceled)
 43. A number detection apparatus comprising from the delayed signals output circuit and the judgment circuit, wherein, the delayed signals output circuit outputs the second periodic signal which retarded the first periodic signal that frequency changes at time for predetermined time, the judgment circuit inputs the first periodic signal and the second periodic signal, the judgment circuit detects whether a period of the first periodic signal was included in a period of the second periodic signal, and outputs the judgment signal, and/or, the judgment circuit detects whether a period of the second periodic signal was included in a period of the first periodic signal, and outputs the judgment signal. The delayed signals output circuit can be comprised by an analog circuit. Also, the delayed signals output circuit can be comprised by a digital circuit. The delay time is set appropriately.
 44. The frequency detection apparatus as claimed in claim 1, wherein, the judgment circuit detects the time when the period of the first periodic signal is included in the period of the second periodic signal, thereby, the judgment circuit judges that the frequency of the first periodic signal changed in a predetermined zone of the high level side or rose to the predetermined value, and/or, the judgment circuit detects the time when the period of the second periodic signal is included in the period of the first periodic signal, thereby, the judgment circuit judges that the frequency of the first periodic signal changed in a predetermined zone of the low level side or dropped to the predetermined value.
 45. The frequency detection apparatus as claimed in 1, wherein, when the judgment circuit detected that the first period of a signal was included for the second period of a signal, the judgment circuit judges depending on the detected number of times that the frequency of the first periodic signal changed into a predetermined level of the high level side or rose to the predetermined value .
 46. A frequency detection apparatus as claimed in claim 1, wherein, Δτ satisfies the next expression, T1+T2+ . . . TJ<=Δτ<T1+T2+ . . . TJ+TJ+1, Tk (k=J, . . . , 3,2,1): the timing of the pulse of k-th of the first periodic signal J: an integer number when the judgment circuit detects that the period of the second periodic signal was included in the first period of a signal, in detection of j-th, it is judged that the frequency of the first periodic signal changed into a predetermined level of the high level side or rose to the predetermine value in delay period (1/j)Δτ(j=J, . . . , 3,2,1).
 47. The frequency detection apparatus as claimed in 1, wherein, the delay circuit inputs the first periodic signal, and it is initialized the second periodic signal to outputting.
 48. The frequency detection apparatus that assumed a frequency detection apparatus of claim 1 one unit, wherein, R-th unit is connected from the first unit that the first periodic signal is input into commonly in parallel, a delay time Δτ1 of the second periodic signal to the first periodic signal in the first unit, a delay time Δτ2 of the second periodic signal to the first periodic signal in the second unit, a delay time ΔτR of the second periodic signal to the first periodic signal in the R-th unit are different each other.
 49. The frequency detection apparatus that assumed a frequency detection apparatus of claim 1 one unit, wherein, the first—R-th units are connected in parallel, the delay time to the first periodic signal of the second periodic signal in each unit is the same, the phase of each first periodic signal in the R unit is different by 2π/R.
 50. The frequency detection apparatus as claimed in claim 1, wherein, the first periodic signal is performed voltage-frequency conversion of.
 51. The electric circuit controller comprising a driving signal generation circuit, a periodic signal generation circuit and a frequency detecting circuit, wherein, the driving signal generation circuit drives at least one electric switch included in the electric circuit, the periodic signal generation circuit detects an electric signal (voltage/current/electric power/a phase) that changes by the electric switch being driven more than one or one, even more particularly, the periodic signal generation circuit generates a periodic signal from at least one electric signal selected from these detecting signals, and this is output as first periodic signal, the frequency detecting circuit has a delayed signals generation circuit and a judgment circuit, the delayed signals generation circuit outputs the second periodic signal which delayed the first periodic signal for predetermined time the judgment circuit inputs the first periodic signal and the second periodic signal, even more particularly, the judgment circuit detects whether the period of the first periodic signal was included the period of the second periodic signal, and/or, the judgment circuit detects whether the period of the second periodic signal was included the period of the first periodic signal.
 52. The electric circuit controller as claimed in claim 9, wherein, the electric signal are selected from, the input voltage of the electric circuit, the input voltage of the electric circuit, the voltage that an element comprising the electric circuit or equipment shows, an above element or above equipment current flowing, the output voltage of the electric circuit, or the output current of the electric circuit.
 53. The electric circuit controller as claimed in claim 9, wherein, the delayed signals generation circuit delays the first periodic signal regardless of the change of the electric signal, and delays the first periodic signal based on at least one of the said electric signals, and outputs the second periodic signal.
 54. The electric circuit controller as claimed in claim 9, wherein, the judgment circuit detects time when the period of the first periodic signal was included in the period of the second periodic signal, thereby, the frequency detecting circuit judges that the frequency of the first periodic signal rose in predetermined value.
 55. The electric circuit controller as claimed in claim 9, wherein, when the judgment circuit detected that the period of the first periodic signal is included the period of the second periodic signal in i-th detection, the frequency of the first periodic signal is considered to have changed in a predetermined level of the high level side at the delay time Δτ/i (i=1,2, . . . , I, I is a positive integer), or, the frequency of the first periodic signal is considered to have reached the predetermined value of the rise direction side at the delay time Δτ/i (i=1,2, . . . , I, I is a positive integer).
 56. The electric circuit controller as claimed in claim 9, wherein, in a case of below, T1+T2+ . . . +TJ<=Δτ<T1+T2+ . . . +TJ+TJ+1(J is a positive integer), when the judgment circuit detected that the period of the second periodic signal was included in the period of the first periodic signal in j-th detection, the frequency of the first periodic signal is considered to have changed in a predetermined level of the high level side at the delay time Δτ/i (i=J, . . . , 3,2,1, J is a positive integer). or, the frequency of the first periodic signal is considered to have reached the predetermined value of the rise direction side at the delay time Δτ/i (i=J,...,3,2,1, J is a positive integer).
 57. The electric circuit controller as claimed in claim 9, wherein, the delay circuit inputs the first periodic signal, and it is initialized the second periodic signal to output.
 58. The frequency detection apparatus that assumed a frequency detection apparatus of claim 9 one unit, wherein, R-th units are connected from the first unit in parallel, making a common use of in the first periodic signal, the delay time Δτ1 of the second periodic signal to the first periodic signal in the first unit, the delay time Δτ2 of the second periodic signal to the first periodic signal in the second unit, the delay time ΔτR of the second periodic signal to the first periodic signal in the second unit are different each other.
 59. The electric circuit controller that assumed a frequency detection apparatus of claim 9 one unit, wherein, the first—R-th units are connected in parallel, the delay time to the first periodic signal of the second periodic signal in each unit is the same, the phase of each first periodic signal in the R unit is different by 2π/R.
 60. The electric circuit controller that assumed a frequency detection apparatus of claim 9 one unit, wherein, the electric circuit is AC/DC power inverter circuit of current control type or the voltage-controlled or DC/DC power inverter circuit, the electric signal is at least one of the next values, the input voltage of the electric circuit, the input voltage of the electric circuit, the voltage that an element comprising the electric circuit or equipment shows, the element or the equipment current flowing, the output voltage of the electric circuit, and the output current of the electric circuit. 